How to Clean the Virtual Memoryby G.S. Jackson
Microsoft Windows virtual memory represents a file in which information used by programs in physical memory is not immediately required. As such, it can get a little crowded with possibly sensitive information such as bank accounts and credit card numbers. To clean this information out, you can set the local security policy to wipe out the file after reboot. This way, all information will be cleared and not held over between sessions.
Click "Start | Control Panel | Administrative Tools | Local Security Policy."
Click the arrow next to "Local Policies" in the left-hand menu, then click the "Security Options" item. The list of options in the "policy" pane of the window changes.
Scroll down through the list of policy options and double-click the "Shutdown: Clear Virtual Memory Pagefile" item.
Click the "Enabled" radio button, then click "Apply." Now Windows will clean the virtual memory pagefile after each reboot.