That "shift" key must be pretty worn down by now with all those capitals. Forums should read like a book, not like a front cover.
Anyway, I download music, then check it by extension:
.MP3 => [OK]
.WMA => OK, but not very good.
.OGG => [OK]
.COM => NO WAY! Virus here!
etc...
Videos - I perform a similar check. (PS. Linux doesn't catch Windows viruses. You can run limewire for linux)
Cracked program - If you use windows, run "fc /b XXXX YYYY" on the files. If they are totally different (or of different size), trash it. Also, you could just crack it with any good debugger. But let's speak no more on this subject.

And next time, use find/replace on your post:
Geeks --> Intellectuals.
I'm sure most people would not like to be called geeks, let alone by someone who can't spell "you"!

OK! Rant over.