How To Clear the Page File on Shutdown

Another way to set the computer to clear the pagefile without directly editing the registry is:

Click on the Start button

Go to the Control Panel

Administrative Tools

Local Security Policy

Local Policies

Click on Security Options

Right hand menu - right click on "Shutdown: Clear Virtual Memory Pagefile"
Select "Enable"

Reboot

If you want to clear the page file on each shutdown:

Start Regedit
Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\ClearPageFileAtShutdown

Set the value to 1