(OS 6)Ο δείκτης χειρισμού δεν είναι έγκυρος <== need a translation
if the translation is "[crit] (OS 6)The handle is invalid"
The (OS 6) [I believe] indicates the error is propagating from the Operating System and the problem relates to an exe or DLL that is not loading. (because Apache can't find it)
If you have firewall software or an internet 'suite' installed, try disabling it and seeing if that does the trick. If that enables Apache, then you will need to learn how to make httpd.exe (or whatever else is blocked) an internet-enabled (safe) application. In particular, Comodo does not see Apache (httpd.exe) as a safe file -- others may auto-block applications that use ports 80 or 443.
A few questions also:
First - where did you install XAMPP?? (what drive and folder)
Second - what method did you use to install - the installer or the zip file??
Third - Did you make any adjustments to php.ini???
Apache master_main: create child process failed. OS 6
read the end of this one -http://serverfault.com/questions/106790 ... zilla-does