Windows 10 1809 update kills Apache

[topperfloats]

Up until this update, I was happily building my site on a Windows 10 1803 build localhost and was just about complete and ready to migrate to online.

So post update I get this (same as others):

8:50:40 AM [Apache] Error: Apache shutdown unexpectedly.
8:50:40 AM [Apache] This may be due to a blocked port, missing dependencies,
8:50:40 AM [Apache] improper privileges, a crash, or a shutdown by another method.
8:50:40 AM [Apache] Press the Logs button to view error logs and check
8:50:40 AM [Apache] the Windows Event Viewer for more clues
8:50:40 AM [Apache] If you need more help, copy and post this
8:50:40 AM [Apache] entire log window on the forums

Found nothing on Google search. Downloaded latest build of XAMPP. Renamed old install (xampp-old) to preserve my site files. Installed new version - Apache will NOT start. Logs show this error (from other posts). Since it was working on Friday, this is totally on MS. I did find that the new version of Win10 is NOT listening on port 80 (netstat -aio). Modified firewall to specifically allow httpd.exe through ports 80, 443 (UDP and TCP) - no change.

[color=#40BF80][color=#40FF40][Sun Jan 20 15:38:11.859459 2019] [core:warn] [pid 6584:tid 776] AH00098: pid file C:/xampp/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Sun Jan 20 15:38:13.065528 2019] [ssl:warn] [pid 6584:tid 776] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 15:33:12.547590 2019] [ssl:warn] [pid 5628:tid 776] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 15:33:13.218629 2019] [core:warn] [pid 5628:tid 776] AH00098: pid file C:/xampp/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Mon Jan 21 15:33:14.348693 2019] [ssl:warn] [pid 5628:tid 776] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name[/color][/color]

Has anyone found a solution?

[Altrea]

Hi,

Found a solution for what? An unknown Apache starting issue?
First things first: identify the issue.
Please read this thread carefully and provide us all the missing information
[Q&A] Insufficient debug information - Apache starting issue

Best wishes,
Altrea

[topperfloats]

Thanks for the feedback. Thought you might have seen this before. Here's the data you requested:

After the 1809 Windows update, Apache quit. Installed new, same result.

Running XAMPP version 7.3.1 (from readme_en.txt) (Compiled: Nov 12, 2015) with administrator rights and not automatically loading. Click Start Apache get error - same error whether running as administrator (service) or not.

PC is Windows 10 Home Version 1809 OS Build 17763.253 installed on 1/21/19 w/16gb RAM. Installation path is c:\xampp using "xampp-win32-7.3.1-0-VC15-installer"

Trying to start Apache, get this: (BTW, there are no Windows Events as it never starts):

10:43:05 AM [main] Initializing Control Panel
10:43:05 AM [main] Windows Version: Home 64-bit
10:43:05 AM [main] XAMPP Version: 7.3.1
10:43:05 AM [main] Control Panel Version: 3.2.2 [ Compiled: Nov 12th 2015 ]
10:43:05 AM [main] Running with Administrator rights - good!
10:43:05 AM [main] XAMPP Installation Directory: "c:\xampp\"
10:43:05 AM [main] Checking for prerequisites
10:43:06 AM [main] All prerequisites found
10:43:06 AM [main] Initializing Modules
10:43:06 AM [main] The FileZilla module is disabled
10:43:06 AM [main] The Mercury module is disabled
10:43:06 AM [main] The Tomcat module is disabled
10:43:06 AM [main] Starting Check-Timer
10:43:06 AM [main] Control Panel Ready
10:43:18 AM [Apache] Attempting to start Apache app...
10:43:18 AM [Apache] Status change detected: running
10:43:19 AM [Apache] Status change detected: stopped
10:43:19 AM [Apache] Error: Apache shutdown unexpectedly.
10:43:19 AM [Apache] This may be due to a blocked port, missing dependencies,
10:43:19 AM [Apache] improper privileges, a crash, or a shutdown by another method.
10:43:19 AM [Apache] Press the Logs button to view error logs and check
10:43:19 AM [Apache] the Windows Event Viewer for more clues
10:43:19 AM [Apache] If you need more help, copy and post this
10:43:19 AM [Apache] entire log window on the forums

Output of apache_start.bat:

Diese Eingabeforderung nicht waehrend des Running beenden
Bitte erst bei einem gewollten Shutdown schliessen
Please close this command only for Shutdown
Apache 2 is starting ...
httpd.exe: Syntax error on line 74 of C:/xampp/apache/conf/httpd.conf: Cannot load modules/mod_access_compat.so into server: The specified module could not be found.

Apache konnte nicht gestartet werden
Apache could not be started
Press any key to continue . . .

NOTE: the mod_access_compat.so file is exactly where it says it can't find it. I can open it, all permissions set. When viewing the file, it does contain an invalid path (c:\vc15\win32\httpd-2.4\modules\mappers\mod_actions) that is not in my system. These files are dated 11/21/18 form a fresh install of the latest download. Previous file versions (which quit after the Win10 1809 update) was 8/15/18.

File is in c:\xampp\apache\modules. Here's my httpd.conf file:

#
# This is the main Apache HTTP server configuration file. It contains the
# configuration directives that give the server its instructions.
# See <URL:http://httpd.apache.org/docs/2.4/> for detailed information.
# In particular, see
# <URL:http://httpd.apache.org/docs/2.4/mod/directives.html>
# for a discussion of each configuration directive.
#
# Do NOT simply read the instructions in here without understanding
# what they do. They're here only as hints or reminders. If you are unsure
# consult the online docs. You have been warned.
#
# Configuration and logfile names: If the filenames you specify for many
# of the server's control files begin with "/" (or "drive:/" for Win32), the
# server will use that explicit path. If the filenames do *not* begin
# with "/", the value of ServerRoot is prepended -- so "logs/access_log"
# with ServerRoot set to "/usr/local/apache2" will be interpreted by the
# server as "/usr/local/apache2/logs/access_log", whereas "/logs/access_log"
# will be interpreted as '/logs/access_log'.
#
# NOTE: Where filenames are specified, you must use forward slashes
# instead of backslashes (e.g., "c:/apache" instead of "c:\apache").
# If a drive letter is omitted, the drive on which httpd.exe is located
# will be used by default. It is recommended that you always supply
# an explicit drive letter in absolute paths to avoid confusion.

#
# ServerRoot: The top of the directory tree under which the server's
# configuration, error, and log files are kept.
#
# Do not add a slash at the end of the directory path. If you point
# ServerRoot at a non-local disk, be sure to specify a local disk on the
# Mutex directive, if file-based mutexes are used. If you wish to share the
# same ServerRoot for multiple httpd daemons, you will need to change at
# least PidFile.
#
Define SRVROOT "C:/xampp/apache"

ServerRoot "C:/xampp/htdocs"

#
# Mutex: Allows you to set the mutex mechanism and mutex file directory
# for individual mutexes, or change the global defaults
#
# Uncomment and change the directory if mutexes are file-based and the default
# mutex file directory is not on a local disk or is not appropriate for some
# other reason.
#
# Mutex default:logs

#
# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, instead of the default. See also the <VirtualHost>
# directive.
#
# Change this to Listen on specific IP addresses as shown below to
# prevent Apache from glomming onto all bound IP addresses.
#
#Listen 12.34.56.78:80
Listen 192.168.0.39:80

#
# Dynamic Shared Object (DSO) Support
#
# To be able to use the functionality of a module which was built as a DSO you
# have to place corresponding `LoadModule' lines at this location so the
# directives contained in it are actually available _before_ they are used.
# Statically compiled modules (those listed by `httpd -l') do not need
# to be loaded here.
#
# Example:
# LoadModule foo_module modules/mod_foo.so
#
LoadModule access_compat_module modules/mod_access_compat.so
LoadModule actions_module modules/mod_actions.so
LoadModule alias_module modules/mod_alias.so
LoadModule allowmethods_module modules/mod_allowmethods.so
LoadModule asis_module modules/mod_asis.so
LoadModule auth_basic_module modules/mod_auth_basic.so
#LoadModule auth_digest_module modules/mod_auth_digest.so
#LoadModule auth_form_module modules/mod_auth_form.so
#LoadModule authn_anon_module modules/mod_authn_anon.so
LoadModule authn_core_module modules/mod_authn_core.so
#LoadModule authn_dbd_module modules/mod_authn_dbd.so
#LoadModule authn_dbm_module modules/mod_authn_dbm.so
LoadModule authn_file_module modules/mod_authn_file.so
#LoadModule authn_socache_module modules/mod_authn_socache.so
#LoadModule authnz_fcgi_module modules/mod_authnz_fcgi.so
#LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
LoadModule authz_core_module modules/mod_authz_core.so
#LoadModule authz_dbd_module modules/mod_authz_dbd.so
#LoadModule authz_dbm_module modules/mod_authz_dbm.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
LoadModule authz_host_module modules/mod_authz_host.so
#LoadModule authz_owner_module modules/mod_authz_owner.so
LoadModule authz_user_module modules/mod_authz_user.so
LoadModule autoindex_module modules/mod_autoindex.so
#LoadModule brotli_module modules/mod_brotli.so
#LoadModule buffer_module modules/mod_buffer.so
#LoadModule cache_module modules/mod_cache.so
#LoadModule cache_disk_module modules/mod_cache_disk.so
#LoadModule cache_socache_module modules/mod_cache_socache.so
#LoadModule cern_meta_module modules/mod_cern_meta.so
LoadModule cgi_module modules/mod_cgi.so
#LoadModule charset_lite_module modules/mod_charset_lite.so
#LoadModule data_module modules/mod_data.so
#LoadModule dav_module modules/mod_dav.so
#LoadModule dav_fs_module modules/mod_dav_fs.so
LoadModule dav_lock_module modules/mod_dav_lock.so
#LoadModule dbd_module modules/mod_dbd.so
#LoadModule deflate_module modules/mod_deflate.so
LoadModule dir_module modules/mod_dir.so
#LoadModule dumpio_module modules/mod_dumpio.so
LoadModule env_module modules/mod_env.so
#LoadModule expires_module modules/mod_expires.so
#LoadModule ext_filter_module modules/mod_ext_filter.so
#LoadModule file_cache_module modules/mod_file_cache.so
#LoadModule filter_module modules/mod_filter.so
#LoadModule http2_module modules/mod_http2.so
LoadModule headers_module modules/mod_headers.so
#LoadModule heartbeat_module modules/mod_heartbeat.so
#LoadModule heartmonitor_module modules/mod_heartmonitor.so
#LoadModule ident_module modules/mod_ident.so
#LoadModule imagemap_module modules/mod_imagemap.so
LoadModule include_module modules/mod_include.so
LoadModule info_module modules/mod_info.so
LoadModule isapi_module modules/mod_isapi.so
#LoadModule lbmethod_bybusyness_module modules/mod_lbmethod_bybusyness.so
#LoadModule lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so
#LoadModule lbmethod_bytraffic_module modules/mod_lbmethod_bytraffic.so
#LoadModule lbmethod_heartbeat_module modules/mod_lbmethod_heartbeat.so
#LoadModule ldap_module modules/mod_ldap.so
#LoadModule logio_module modules/mod_logio.so
LoadModule log_config_module modules/mod_log_config.so
#LoadModule log_debug_module modules/mod_log_debug.so
#LoadModule log_forensic_module modules/mod_log_forensic.so
#LoadModule lua_module modules/mod_lua.so
LoadModule cache_disk_module modules/mod_cache_disk.so
#LoadModule macro_module modules/mod_macro.so
#LoadModule md_module modules/mod_md.so
LoadModule mime_module modules/mod_mime.so
#LoadModule mime_magic_module modules/mod_mime_magic.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
#LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
#LoadModule proxy_connect_module modules/mod_proxy_connect.so
#LoadModule proxy_express_module modules/mod_proxy_express.so
#LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so
#LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
#LoadModule proxy_hcheck_module modules/mod_proxy_hcheck.so
#LoadModule proxy_html_module modules/mod_proxy_html.so
#LoadModule proxy_http_module modules/mod_proxy_http.so
#LoadModule proxy_http2_module modules/mod_proxy_http2.so
#LoadModule proxy_scgi_module modules/mod_proxy_scgi.so
#LoadModule proxy_uwsgi_module modules/mod_proxy_uwsgi.so
#LoadModule proxy_wstunnel_module modules/mod_proxy_wstunnel.so
#LoadModule ratelimit_module modules/mod_ratelimit.so
#LoadModule reflector_module modules/mod_reflector.so
#LoadModule remoteip_module modules/mod_remoteip.so
#LoadModule request_module modules/mod_request.so
#LoadModule reqtimeout_module modules/mod_reqtimeout.so
LoadModule rewrite_module modules/mod_rewrite.so
#LoadModule sed_module modules/mod_sed.so
#LoadModule session_module modules/mod_session.so
#LoadModule session_cookie_module modules/mod_session_cookie.so
#LoadModule session_crypto_module modules/mod_session_crypto.so
#LoadModule session_dbd_module modules/mod_session_dbd.so
LoadModule setenvif_module modules/mod_setenvif.so
#LoadModule slotmem_plain_module modules/mod_slotmem_plain.so
#LoadModule slotmem_shm_module modules/mod_slotmem_shm.so
#LoadModule socache_dbm_module modules/mod_socache_dbm.so
#LoadModule socache_memcache_module modules/mod_socache_memcache.so
LoadModule socache_shmcb_module modules/mod_socache_shmcb.so
#LoadModule speling_module modules/mod_speling.so
LoadModule ssl_module modules/mod_ssl.so
LoadModule status_module modules/mod_status.so
#LoadModule substitute_module modules/mod_substitute.so
#LoadModule unique_id_module modules/mod_unique_id.so
#LoadModule userdir_module modules/mod_userdir.so
#LoadModule usertrack_module modules/mod_usertrack.so
LoadModule version_module modules/mod_version.so
#LoadModule vhost_alias_module modules/mod_vhost_alias.so
#LoadModule watchdog_module modules/mod_watchdog.so
#LoadModule xml2enc_module modules/mod_xml2enc.so

<IfModule unixd_module>
#
# If you wish httpd to run as a different user or group, you must run
# httpd as root initially and it will switch.
#
# User/Group: The name (or #number) of the user/group to run httpd as.
# It is usually good practice to create a dedicated user and group for
# running httpd, as with most system services.
#
User daemon
Group daemon

</IfModule>

# 'Main' server configuration
#
# The directives in this section set up the values used by the 'main'
# server, which responds to any requests that aren't handled by a
# <VirtualHost> definition. These values also provide defaults for
# any <VirtualHost> containers you may define later in the file.
#
# All of these directives may appear inside <VirtualHost> containers,
# in which case these default settings will be overridden for the
# virtual host being defined.
#

#
# ServerAdmin: Your address, where problems with the server should be
# e-mailed. This address appears on some server-generated pages, such
# as error documents. e.g. admin@your-domain.com
#
ServerAdmin postmaster@localhost

#
# ServerName gives the name and port that the server uses to identify itself.
# This can often be determined automatically, but we recommend you specify
# it explicitly to prevent problems during startup.
#
# If your host doesn't have a registered DNS name, enter its IP address here.
#
ServerName 192.168.0.39:80

#
# Deny access to the entirety of your server's filesystem. You must
# explicitly permit access to web content directories in other
# <Directory> blocks below.
#
<Directory />
AllowOverride none
Require all granted
</Directory>

#
# Note that from this point forward you must specifically allow
# particular features to be enabled - so if something's not working as
# you might expect, make sure that you have specifically enabled it
# below.
#

#
# DocumentRoot: The directory out of which you will serve your
# documents. By default, all requests are taken from this directory, but
# symbolic links and aliases may be used to point to other locations.
#
DocumentRoot "C:/xampp/htdocs"
<Directory "C:/xampp/htdocs">
#
# Possible values for the Options directive are "None", "All",
# or any combination of:
# Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
#
# Note that "MultiViews" must be named *explicitly* --- "Options All"
# doesn't give it to you.
#
# The Options directive is both complicated and important. Please see
# http://httpd.apache.org/docs/2.4/mod/core.html#options
# for more information.
#
Options Indexes FollowSymLinks Includes ExecCGI

#
# AllowOverride controls what directives may be placed in .htaccess files.
# It can be "All", "None", or any combination of the keywords:
# AllowOverride FileInfo AuthConfig Limit
#
AllowOverride All

#
# Controls who can get stuff from this server.
#
Require all granted
</Directory>

#
# DirectoryIndex: sets the file that Apache will serve if a directory
# is requested.
#
<IfModule dir_module>
DirectoryIndex index.php index.pl index.cgi index.asp index.shtml index.html index.htm \
default.php default.pl default.cgi default.asp default.shtml default.html default.htm \
home.php home.pl home.cgi home.asp home.shtml home.html home.htm
</IfModule>

#
# The following lines prevent .htaccess and .htpasswd files from being
# viewed by Web clients.
#
<Files ".ht*">
Require all denied
</Files>

#
# ErrorLog: The location of the error log file.
# If you do not specify an ErrorLog directive within a <VirtualHost>
# container, error messages relating to that virtual host will be
# logged here. If you *do* define an error logfile for a <VirtualHost>
# container, that host's errors will be logged there and not here.
#
ErrorLog "logs/error.log"

#
# LogLevel: Control the number of messages logged to the error_log.
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
#
LogLevel warn

<IfModule log_config_module>
#
# The following directives define some format nicknames for use with
# a CustomLog directive (see below).
#
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %b" common

<IfModule logio_module>
# You need to enable mod_logio.c to use %I and %O
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
</IfModule>

#
# The location and format of the access logfile (Common Logfile Format).
# If you do not define any access logfiles within a <VirtualHost>
# container, they will be logged here. Contrariwise, if you *do*
# define per-<VirtualHost> access logfiles, transactions will be
# logged therein and *not* in this file.
#
#CustomLog "logs/access.log" common

#
# If you prefer a logfile with access, agent, and referer information
# (Combined Logfile Format) you can use the following directive.
#
CustomLog "logs/access.log" combined
</IfModule>

<IfModule alias_module>
#
# Redirect: Allows you to tell clients about documents that used to
# exist in your server's namespace, but do not anymore. The client
# will make a new request for the document at its new location.
# Example:
# Redirect permanent /foo http://www.example.com/bar

#
# Alias: Maps web paths into filesystem paths and is used to
# access content that does not live under the DocumentRoot.
# Example:
# Alias /webpath /full/filesystem/path
#
# If you include a trailing / on /webpath then the server will
# require it to be present in the URL. You will also likely
# need to provide a <Directory> section to allow access to
# the filesystem path.

#
# ScriptAlias: This controls which directories contain server scripts.
# ScriptAliases are essentially the same as Aliases, except that
# documents in the target directory are treated as applications and
# run by the server when requested rather than as documents sent to the
# client. The same rules about trailing "/" apply to ScriptAlias
# directives as to Alias.
#
ScriptAlias /cgi-bin/ "C:/xampp/cgi-bin/"

</IfModule>

<IfModule cgid_module>
#
# ScriptSock: On threaded servers, designate the path to the UNIX
# socket used to communicate with the CGI daemon of mod_cgid.
#
#Scriptsock cgisock
</IfModule>

#
# "C:/xampp/cgi-bin" should be changed to whatever your ScriptAliased
# CGI directory exists, if you have that configured.
#
<Directory "C:/xampp/cgi-bin">
AllowOverride All
Options None
Require all granted
</Directory>

<IfModule headers_module>
#
# Avoid passing HTTP_PROXY environment to CGI's on this or any proxied
# backend servers which have lingering "httpoxy" defects.
# 'Proxy' request header is undefined by the IETF, not listed by IANA
#
RequestHeader unset Proxy early
</IfModule>

<IfModule mime_module>
#
# TypesConfig points to the file containing the list of mappings from
# filename extension to MIME-type.
#
TypesConfig conf/mime.types

#
# AddType allows you to add to or override the MIME configuration
# file specified in TypesConfig for specific file types.
#
#AddType application/x-gzip .tgz
#
# AddEncoding allows you to have certain browsers uncompress
# information on the fly. Note: Not all browsers support this.
#
#AddEncoding x-compress .Z
#AddEncoding x-gzip .gz .tgz
#
# If the AddEncoding directives above are commented-out, then you
# probably should define those extensions to indicate media types:
#
AddType application/x-compress .Z
AddType application/x-gzip .gz .tgz

#
# AddHandler allows you to map certain file extensions to "handlers":
# actions unrelated to filetype. These can be either built into the server
# or added with the Action directive (see below)
#
# To use CGI scripts outside of ScriptAliased directories:
# (You will also need to add "ExecCGI" to the "Options" directive.)
#
AddHandler cgi-script .cgi .pl .asp

# For type maps (negotiated resources):
#AddHandler type-map var

#
# Filters allow you to process content before it is sent to the client.
#
# To parse .shtml files for server-side includes (SSI):
# (You will also need to add "Includes" to the "Options" directive.)
#
AddType text/html .shtml
AddOutputFilter INCLUDES .shtml
</IfModule>

#
# The mod_mime_magic module allows the server to use various hints from the
# contents of the file itself to determine its type. The MIMEMagicFile
# directive tells the module where the hint definitions are located.
#
<IfModule mime_magic_module>
#
# The mod_mime_magic module allows the server to use various hints from the
# contents of the file itself to determine its type. The MIMEMagicFile
# directive tells the module where the hint definitions are located.
#
MIMEMagicFile "conf/magic"
</IfModule>


#
# Customizable error responses come in three flavors:
# 1) plain text 2) local redirects 3) external redirects
#
# Some examples:
#ErrorDocument 500 "The server made a boo boo."
#ErrorDocument 404 /missing.html
#ErrorDocument 404 "/cgi-bin/missing_handler.pl"
#ErrorDocument 402 http://www.example.com/subscription_info.html
#

#
# MaxRanges: Maximum number of Ranges in a request before
# returning the entire resource, or one of the special
# values 'default', 'none' or 'unlimited'.
# Default setting is to accept 200 Ranges.
#MaxRanges unlimited

#
# EnableMMAP and EnableSendfile: On systems that support it,
# memory-mapping or the sendfile syscall may be used to deliver
# files. This usually improves server performance, but must
# be turned off when serving from networked-mounted
# filesystems or if support for these functions is otherwise
# broken on your system.
# Defaults: EnableMMAP On, EnableSendfile Off
#
#EnableMMAP off
#EnableSendfile off

# Supplemental configuration
#
# The configuration files in the conf/extra/ directory can be
# included to add extra features or to modify the default configuration of
# the server, or you may simply copy their contents here and change as
# necessary.

# Server-pool management (MPM specific)
Include conf/extra/httpd-mpm.conf

# Multi-language error messages
Include conf/extra/httpd-multilang-errordoc.conf

# Fancy directory listings
Include conf/extra/httpd-autoindex.conf

# Language settings
Include conf/extra/httpd-languages.conf

# User home directories
Include conf/extra/httpd-userdir.conf

# Real-time info on requests and configuration
Include conf/extra/httpd-info.conf

# Virtual hosts
Include conf/extra/httpd-vhosts.conf

# Local access to the Apache HTTP Server Manual
#Include conf/extra/httpd-manual.conf

# Distributed authoring and versioning (WebDAV)
#Attention! WEB_DAV is a security risk without a new userspecific configuration for a secure authentifcation
#Include conf/extra/httpd-dav.conf

# Various default settings
#Include conf/extra/httpd-default.conf
# Implements a proxy/gateway for Apache.
Include "conf/extra/httpd-proxy.conf"
# Various default settings
Include "conf/extra/httpd-default.conf"
# XAMPP settings
Include "conf/extra/httpd-xampp.conf"

# Configure mod_proxy_html to understand HTML4/XHTML1
<IfModule proxy_html_module>
Include conf/extra/proxy-html.conf
</IfModule>

# Secure (SSL/TLS) connections
Include conf/extra/httpd-ssl.conf
#
# Note: The following must must be present to support
# starting without SSL on platforms with no /dev/random equivalent
# but a statically compiled-in mod_ssl.
#
<IfModule ssl_module>
SSLRandomSeed startup builtin
SSLRandomSeed connect builtin
</IfModule>

# XAMPP: We disable operating system specific optimizations for a listening
# socket by the http protocol here. IE 64 bit make problems without this.

AcceptFilter http none
AcceptFilter https none
# AJP13 Proxy
<IfModule mod_proxy.c>
<IfModule mod_proxy_ajp.c>
Include "conf/extra/httpd-ajp.conf"
</IfModule>
</IfModule>

Here's my Apache error log from c:\xampp\apache\logs\error.log

[Mon Jan 21 14:12:41.247136 2019] [ssl:warn] [pid 4784:tid 716] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:12:41.309721 2019] [ssl:warn] [pid 4784:tid 716] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:12:41.372374 2019] [mpm_winnt:notice] [pid 4784:tid 716] AH00455: Apache/2.4.37 (Win32) OpenSSL/1.1.1a PHP/7.3.1 configured -- resuming normal operations
[Mon Jan 21 14:12:41.372374 2019] [mpm_winnt:notice] [pid 4784:tid 716] AH00456: Apache Lounge VC15 Server built: Nov 21 2018 11:27:36
[Mon Jan 21 14:12:41.372374 2019] [core:notice] [pid 4784:tid 716] AH00094: Command line: 'C:\\xampp\\apache\\bin\\httpd.exe -d C:/xampp/apache'
[Mon Jan 21 14:12:41.388067 2019] [mpm_winnt:notice] [pid 4784:tid 716] AH00418: Parent: Created child process 1152
[Mon Jan 21 14:12:41.841084 2019] [ssl:warn] [pid 1152:tid 256] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:12:41.919191 2019] [ssl:warn] [pid 1152:tid 256] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:12:41.981679 2019] [mpm_winnt:notice] [pid 1152:tid 256] AH00354: Child: Starting 150 worker threads.
[Mon Jan 21 14:13:31.422060 2019] [ssl:warn] [pid 3852:tid 692] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:13:31.484615 2019] [ssl:warn] [pid 3852:tid 692] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:13:31.515758 2019] [mpm_winnt:notice] [pid 3852:tid 692] AH00455: Apache/2.4.37 (Win32) OpenSSL/1.1.1a PHP/7.3.1 configured -- resuming normal operations
[Mon Jan 21 14:13:31.515758 2019] [mpm_winnt:notice] [pid 3852:tid 692] AH00456: Apache Lounge VC15 Server built: Nov 21 2018 11:27:36
[Mon Jan 21 14:13:31.515758 2019] [core:notice] [pid 3852:tid 692] AH00094: Command line: 'c:\\xampp\\apache\\bin\\httpd.exe -d C:/xampp/apache'
[Mon Jan 21 14:13:31.531378 2019] [mpm_winnt:notice] [pid 3852:tid 692] AH00418: Parent: Created child process 5880
[Mon Jan 21 14:13:32.187505 2019] [ssl:warn] [pid 5880:tid 704] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:13:32.234439 2019] [ssl:warn] [pid 5880:tid 704] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:13:32.265581 2019] [mpm_winnt:notice] [pid 5880:tid 704] AH00354: Child: Starting 150 worker threads.
[Mon Jan 21 14:28:00.099457 2019] [ssl:warn] [pid 2960:tid 736] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:28:00.162013 2019] [core:warn] [pid 2960:tid 736] AH00098: pid file C:/xampp/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Mon Jan 21 14:28:00.162013 2019] [ssl:warn] [pid 2960:tid 736] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:28:00.193185 2019] [mpm_winnt:notice] [pid 2960:tid 736] AH00455: Apache/2.4.37 (Win32) OpenSSL/1.1.1a PHP/7.3.1 configured -- resuming normal operations
[Mon Jan 21 14:28:00.193185 2019] [mpm_winnt:notice] [pid 2960:tid 736] AH00456: Apache Lounge VC15 Server built: Nov 21 2018 11:27:36
[Mon Jan 21 14:28:00.193185 2019] [core:notice] [pid 2960:tid 736] AH00094: Command line: 'c:\\xampp\\apache\\bin\\httpd.exe -d C:/xampp/apache'
[Mon Jan 21 14:28:00.208810 2019] [mpm_winnt:notice] [pid 2960:tid 736] AH00418: Parent: Created child process 6012
[Mon Jan 21 14:28:00.864975 2019] [ssl:warn] [pid 6012:tid 692] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:28:00.927386 2019] [ssl:warn] [pid 6012:tid 692] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Jan 21 14:28:00.943008 2019] [mpm_winnt:notice] [pid 6012:tid 692] AH00354: Child: Starting 150 worker threads.

[Altrea]

If you don't need mod_access_compat you should comment that line out.
That is the issue your Apache could not be started.

I don't think the update destroyed your XAMPP installation, except this mod file is getting corrupted by the update.

[topperfloats]

Commented mod_access line.

Same error

[Altrea]

exactly the same error?
Then remove the line entirely.

[topperfloats]

same

[Altrea]

You get the error message "httpd.exe: Syntax error on line 74 of C:/xampp/apache/conf/httpd.conf: Cannot load modules/mod_access_compat.so" even if you completely remove that line 74, save the file and retry to start Apache by apache_start.bat script?

[topperfloats]

Could this be a php issue?

In researching 1809 problems, many have to do with files (missing, lost, deleted, etc.). So thinking I have an issue with my disk, I copied contents of xampp folder, deleted folder, recreated and copied back. Ran chkdsk as administrator - Same. Changed Control Panel to port 81 - same. Then decided to look for diagnostics in xampp and found this:

C:\xampp\install>portcheck.bat
"Checking necessary ports! Please wait ..."

Fatal error: Uncaught Error: Call to undefined function ereg_replace() in C:\xampp\install\portcheck.php:13
Stack trace:
#0 {main}
thrown in C:\xampp\install\portcheck.php on line 13

I'm not a php programmer but here's the offending line 13:

$port = ereg_replace('-', '', $argv[1]);

[Altrea]

No it's not. \xampp\install\portcheck.php is outdated. But nobody uses this portcheck.bat file, so nobody has reported that issue.
The control panel checks for the configured ports, you can use the netstat button in the control panel to list all running ports.

[topperfloats]

No port 80! Couldn't cut/paste XAMPP netstat output so here is netstat from cmd:

:\Users\Owner>netstat -p tcp -a

Active Connections

Proto Local Address Foreign Address State
TCP 0.0.0.0:135 Heron:0 LISTENING
TCP 0.0.0.0:445 Heron:0 LISTENING
TCP 0.0.0.0:5040 Heron:0 LISTENING
TCP 0.0.0.0:5357 Heron:0 LISTENING
TCP 0.0.0.0:49664 Heron:0 LISTENING
TCP 0.0.0.0:49665 Heron:0 LISTENING
TCP 0.0.0.0:49666 Heron:0 LISTENING
TCP 0.0.0.0:49667 Heron:0 LISTENING
TCP 0.0.0.0:49673 Heron:0 LISTENING
TCP 0.0.0.0:49777 Heron:0 LISTENING
TCP 192.168.0.39:139 Heron:0 LISTENING
TCP 192.168.0.39:49780 52.173.28.179:https ESTABLISHED
TCP 192.168.0.39:49798 a23-206-121-55:http CLOSE_WAIT
TCP 192.168.0.39:49799 a23-206-121-55:http CLOSE_WAIT
TCP 192.168.0.39:49975 151.101.53.140:https ESTABLISHED
TCP 192.168.0.39:49976 151.101.53.140:https ESTABLISHED
TCP 192.168.0.39:49993 sea30s02-in-f2:https TIME_WAIT
TCP 192.168.0.39:50002 ox-173-241-250-143:https TIME_WAIT
TCP 192.168.0.39:50018 sea15s07-in-f66:https ESTABLISHED
TCP 192.168.0.39:50019 151.101.54.49:https ESTABLISHED
TCP 192.168.0.39:50021 sea15s12-in-f2:https TIME_WAIT
TCP 192.168.0.39:50027 a23-10-150-121:https ESTABLISHED
TCP 192.168.0.39:50030 216.200.232.201:https ESTABLISHED
TCP 192.168.0.39:50032 8.43.72.98:https TIME_WAIT
TCP 192.168.0.39:50033 8.39.36.173:https TIME_WAIT
TCP 192.168.0.39:50034 8.39.36.173:https TIME_WAIT
TCP 192.168.0.39:50035 8.39.36.173:https TIME_WAIT
TCP 192.168.0.39:50037 8.39.36.143:https TIME_WAIT
TCP 192.168.0.39:50038 8.39.36.143:https TIME_WAIT
TCP 192.168.0.39:50039 8.39.36.143:https TIME_WAIT
TCP 192.168.0.39:50040 8.39.36.143:https TIME_WAIT
TCP 192.168.0.39:50104 ec2-174-129-220-113:https CLOSE_WAIT
TCP 192.168.0.39:50105 13.107.21.200:https ESTABLISHED
TCP 192.168.0.39:50106 bingforbusiness:https ESTABLISHED
TCP 192.168.0.39:50107 13.107.21.200:https ESTABLISHED
TCP 192.168.0.39:50108 131.253.33.254:https ESTABLISHED
TCP 192.168.0.39:50109 13.107.3.254:https ESTABLISHED
TCP 192.168.0.39:50111 204.79.197.222:https ESTABLISHED

[Altrea]

Again: This is NOT a port issue.
This is a syntax error/corrupted file issue.

On my Windows 10 build 1809 XAMPP 7.3.1 installer is running very well.

[topperfloats]

OK. Restoring OS to pre-1809.

[Altrea]

That is your choice. XAMPP can run on 1809 very well.

[topperfloats]

Not here. And I think we've both broken enough teeth on this one to give up. So if you come across any solution, please post.