Apache not serving pages

[jookk]

Hallo all,
my setup:
Windows 8.1 64bit with XAMPP 5.6.3
Im using apache with vhost config (there are 5-6 hosts.
All worked fine, but today I found, that Apache isnt responding to http(s) requests. (So website isnt loading - it timeouts)
I checked Apache and it was running fine, checked VPN hosting - running fine (email server working - emails are received)
Checked Apache error log, but no problem.
So Apache is running, but it not answering to requests (pages timeouts).
It working after I manually restart Apache via services.msc.
I need some help to resolve problem, because Im hosting my sites and other self-hosted apps

[gsmith]

Usually you will see this in Apache's error log
"(OS 64)The specified network name is no longer available. : AH00341: winnt_accept: Asynchronous AcceptEx failed."

Regardless, this symptom is almost always resolved by adding AcceptFilter lines to httpd.conf

AcceptFilter http none
AcceptFilter https none

[jookk]

Very big Thank You for solution!
I had latest days serious thinking about linux virtualbox, becouse apache problems.
Ill write back about successfull finish:)