I suggest F-Disking your computer and not using McAfee. (Sorry for the loss of your beloved files, but the virus probably corrupted them.)
McAfee sucks and is a waste of space on your computer and is the one who probably got you the virus.
I suggest (When you get your computer fixed) switching to AVG, its much better, and staying away from porn sites/ random ads/ and downloads from unknown e-mails.
Thats about all the help/advice I can give you, I hope things turn out better for you.