ATF Cleaner
Another tool to help speed up your computer when it has been running a bit sluggish.

Details:
Simple tool for cleaning temporary files and cache. Can be used to clear up extra space, increase performance and remove unwanted files that you may have missed when manually cleaning your computer.

Piriform CCleaner
This tool was created to help end users struggling with a slow computer.

Details:
Cleans your computers temporary files and fixes common registry issues.

tdsskiller rootkit removal tool
Need a tool to remove various rootkits including Tidserv, TDSServ, Alureon and others in the Rootkit.Win32.TDSS family? If so tdsskiller is the tool for you!

Details:
Download the application from the link below and run it from the desktop, do not run the executable from any sub-folders.

WARNING: All rootkit removal tools should be used at your own risk. If the rootkit has infected vital system files the removal of the rootkit may cause your system to become inoperable.