Clear Page File on Shutdown

WINXPCPS.REG

This Registration (.REG) file clears the Page file when you power off the computer.
Restart Windows for these changes to take effect!
ALWAYS BACKUP YOUR SYSTEM BEFORE MAKING ANY CHANGES!

Browse to: HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Control \ Session Manager \ Memory Management

and add the DWORD variable "ClearPageFileAtShutdown"=dword:00000001

You can also do this without reg hacking.
Go to Control panel -> Administartative tools -> local security policy. then goto local policies -> security options.

Then change the option for "Shutdown: Clear Virtual Memory Pagefile"