UnThreat Free AntiVirus 2012
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Full user review
"Does NOT support Windows 2000"
I wouldn't know
Does NOT support Windows 2000. It doesn't claim to either, if you look at their website. The CNET page is either out of date or just plain wrong.
Trying to run it on Windows 2000 just gives procedure entry point errors in kernel32.dll.
To be fair, my criticism is of the CNET page that lead me to waste my time trying it, not of the product itself.