it didn't find anything
do you mean the "Cleaner", or avast itself on it's first scan ?
please be more detailed, otherwise it's difficult to help..
i downloaded the pro version and and restarted my comp and it found something called (win32:Trojan-Gen) any help?
Where exactly was this found (Path/folder/filename) ?
can you open any .EXE-files by double-clicking them in Explorer or "My Computer" ?
- please read "VirusRemoval" below & try the avast CLEANER