the instruction at "0x 7c919af2" reference memory at 0x00000010 the memory could not be wrtten

Please troubleshoot in Clean Boot Mode. How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7 http://support.microsoft.com/kb/929135 If the issue persists in Clean Boot Mode, I suggest you run In-place Upgrade to repair the system.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Thank you but I am using Windows XP pro I have tried you solution but has not been successfulJohn Luke