CCleaner
This is a guide i came up with that helps you clear your computer of a LOT of junk that may be slowing it down. IN LESS THAN A MINUTE!
CCleaner is a program that is used to delete a lot of crap from your computers registry. It cleans a lot of stuff out making your computer run more efficiently.
Here is the link to download CCleaner: http://www.ccleaner.com/
Here is an example of what it clears:
Step one:After installation, and setup, run your CCleaner from the icon on your desktop, or wherever you wish to access it from.
Step two:(pictures are large so i'll post link)
http://img253.imageshack.us/img253/7595/pic1os7.pngStep three:(pictures are large so i'll post link)
http://img291.imageshack.us/img291/9770/pic2lh4.png