How to speed up my computer?

• System Hang/slow down.

Here is a link showing how to Increase your computer speed, delete unwanted files
and delete unwanted shortcuts from the Desktop
http://www.youtube.com/watch?v=zruSoTSc-A4&feature=related

Here is a link demonstrating - how to clean and speed up your computer?
http://www.youtube.com/watch?v=Kgf5u4PTCik&feature=related