Spybot - Search & Destroy
Very good
Full user review
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"Catches much malware and cleans up systems well"
Pros
Cleans up a lot on systems, including trackers, worms, trojans, etc., and the removal is usually successful and never detrimental to the Windows OS.
Cons
Like any product, this only cleans up after a Windows OS security breech, and while the TeaTimer helps prevent registry changes, post-infection clean-up doesn't mean that your system is safe.
Summary
Great tool to have at the ready from day 1, for when things go pear shaped (as they always do on Windows), especially if your infection doesn't allow you to install new programs. This is a must-have on a USB key or CDRom for cleanup jobs.