What you need to do is go to the start menu and right click on the "My Computer" File and select "Properties"

Then click the advanced tab. Like so...



Then click "Settings" under the "Startup and Recovery Section"



It will open a window, in the window under "Write Debugging Information" Click on the scroll button and then click on Complete Memory Dump.

Walla, you computer will dump all previous sessions's caches and thus making your computer faster.