#2 C Cleaner
C-Cleaner is a fast and efficient software program that will clean out a lot of junk files responsible for slowing your computer performance down. Its a free program which is easy to install and run. It has 'Analyse' and 'Run Cleaner' options. As well as cleaning up your hard drive/s it can also cleanup your Registry which is also crucial to have in best working order.
Cleaning your Registry is important but some programs claiming to do this can actually damage your PC and make it unbootable! So be careful if you are running any reg clean program. Always make a Restore Point first before running one. I've never had any problems running CCleaner/Registry Clean.
Note: An 'Uninstall' option for this program is included under Start/Programs/CCleaner/Uninstall
Very fast and smooth program this - highly recommended.
CCleaner Professional Version (Full Protection)
The professional version will give you round-the-clock protection. I love this program its truly excellent, and I use it on a weekly basis.
To Get CCleaner Professional from the Creator Source / Click Here
CCleaner Free Version (limited Protection)
You can download it directly from the company behind it at: http://www.piriform.com/ccleaner/download