Download Malware bytes Anti-Malware
Malware bytes is a great tool to help you get rid of all the annoying malware stored in your computer that it is causing it to run slow and not as smoothly as it should. You just need to perform a quick and easy scan, and this software will make sure to remove all of that nasty malware. It is super easy to use and it does not take a lot of time to install. Although if you want to have live protection you would need to upgrade to the paid version. Works on Windows 2000, XP, 2003, Vista and 7. A great free tool!