Apache frequent shutdown

[Senthil]

Apache gets shutdown frequently with log below, on windows server 2008 xampp. Please throw some light to fix this and is this a website hack?

[Wed Apr 16 18:27:23 2014] [notice] Parent: child process exited with status 255 -- Restarting.

[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] script 'D:/Folder/Folder/img/FOlder/debug.php' not found or unable to stat
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/img/movies/~log
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/img/search
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/d
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/MediaBox/test.htm
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/img/promotions/promotions.csv
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/css/CMS
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/MediaBox/cmd
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/img/promotions/iishelp
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/img/rss
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/img/movies/~logs
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] script 'C:/Site/Live/img/movies/admin.php' not found or unable to stat
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/e
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] no acceptable variant: C:/xampp/apache/error/HTTP_NOT_FOUND.html.var
[Wed Apr 16 16:43:55 2014] [error] [client 123.136.106.105] File does not exist: C:/Site/Live/img/promotions/promotions.pst

...................
...................
...................

[Wed Apr 16 16:52:50 2014] [error] [client 123.238.234.113] Directory index forbidden by Options directive: C:/Site/Live/img/test/
[Wed Apr 16 16:53:04 2014] [error] [client 49.50.236.216] File does not exist: C:/Site/Live/S2.jpg
Cannot initialize zend_mm storage [win32]
[Wed Apr 16 16:53:33 2014] [notice] Parent: child process exited with status 255 -- Restarting.

[Wed Apr 16 23:34:01 2014] [error] [client 157.55.35.37] File does not exist: C:/Site/Live/jomsocial