Here's the exact order everything occurred in...
Avast! was the first scan ran, and found the rootkit.
I proceeded to download aswmbr, mbam, and rogue killer...
I ran Rogue killer and aswmbr at the same time, rogue killer finished.
When rogue killer stopped, I started a scan on mbam, (It might be useful to know the rootkit search was checked on the mbam scan.)
Aswmbr finished, and a minute or less after while mbam was still scanning, the BSOD occurred.
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I haven't gotten a BSOD since the first one, and this was the first time I've got one on this drive that I know of.
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First I tried to move it to the chest, but Avast! said the file was not found, then I tried to delete it, but Avast! wouldn't let me do that either.
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Thank you for the information and your help so far!