If you suspect you have been infected, there are a few steps you can do. First, run a regular virus scan. The simplest ones can be removed with the most up-to-date antivirus programs. The scans can be run in safe or regular mode, however true rootkits may not show up easily. A better option is to use specialized rootkit detectors like the ones below.
I use 2 and 3...and have been for many years. Avast can check for rootkits at start-up. (I think it does by default) Some other rootkit tools are GMER catchme, IceSword, and the aways popular HiJackThis.
-- Edited by NicKnayme on Sunday 22nd of August 2010 12:48:08 PM