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I have XAMPP installed. I am running Windows 7. I have WordPress installed so that I may tweak it and test things locally before putting them 'live' on a remote server. I just installed BuddyPress. The installation was rather seamless. I activated the plugin and almost immediately, Apache crashed. I have Apache running as a service so it immediately restarted itself and was running BUT if I even so much as refresh the page (or create any other request), down it goes.

Listed here is the error report as generated by Windows 7:

Problem signature:
  Problem Event Name: APPCRASH
  Application Name: apache.exe
  Application Version:
  Application Timestamp: 45ebef86
  Fault Module Name: ZendOptimizer.dll
  Fault Module Version:
  Fault Module Timestamp: 45ea8fee
  Exception Code: c0000005
  Exception Offset: 0004dc22
  OS Version: 6.1.7600.
  Locale ID: 1033
  Additional Information 1: 1ec0
  Additional Information 2: 1ec0fd70d07d060e5bfcf53c69ad1739
  Additional Information 3: 2c48
  Additional Information 4: 2c48940de5e7d1cb2e131ad6a0ca2feb

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I don't have a XAMPP installation handy, but try to remove (or comment out) the line referring to the ZendOptimizer.dll (which is the part that crashed) in your php.ini file and then restart it.

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Would there be any harm in simply removing the entire [Zend] section from php.ini? – Dan May 24 '10 at 22:32
If your problem isn't solved without just removing the Optimizer, just give it a try, if only to locate the problem. – Sven May 25 '10 at 7:10

Solutions : - Try run XAMPP Control Panel as Administrator (Right Click menu on the shortcut). - Re-install XAMPP as Administrator (Right Click at .EXE file, choose "Run as administrator).

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it looks like an OS problem, it may caused by UAC of windows 7. Zendoptimizer comes with Xampp is ok. tested may times over&over. Xampp always advices to turn off UAC. try without UAC.

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