uwamp apache error - Failed to kill process

I have UwAmp 3.1.0, sometimes the Apache has trouble to close properly regardless the PHP version installed.

Logs file are telling me

[Thu Mar 03 12:50:58.385893 2016] [mpm_winnt:crit] [pid 544:tid 236] AH02538: Child: Parent process exited abruptly. Child process is ending

here the configuration file for apache http://pastebin.com/iJZmdS3A

The problem comes with Windows 7 and windows 10

thanks