Do not use BitDefender. I was using BitDefender 9 Professional. Whenever I right-clicked on a file and scanned it manually, BitDefender used to delete it from the system, and that too, when the file did not have any infection. I downloaded Windows Vista RC1 from Microsoft's official site and, like a total idiot, ran it through BitDefender's scanner. The stupid thing deleted my 3.6GB ISO and I had to re-download the whole thing.
They might've fixed it in this version though.
