I had the PC performance virus that isa fake analysis to get you to buy something to fix the errors that pop up. It also made my desktop go blank and when i open the start menu and look at any of the files it says empty under each. I downloaded Emsisoft Anti-Malware...ran the scan and it put the files/virus in quarentine. I haven't seen the PC analysis pop up since, but my desktop is still blank. How do I fix it?