Avast? Never heard of it - is it a free anti-virus software?
My advice - get a proper one, preferably Norton or MacAfee. As soon as you get a copy, scan your files. If it still doesn't unearth anything, get the latest updates for the anti-virus software. After that, if it's still there, get it sent of to your computer manufacturer. If you still have a guarantee, it should be repaired for free.
In the meantime, try using Windows Defender/ Anti-Virus Software. It should be easy enough to locate on a Vista's home system. On XP, I'm not too sure.
So you know what to do with any cash you get for Christmas - buy an anti-virus software!
