With Select folder (you can say what folder was scanned) and to find the actual file name, you would have to have set that up to create a report file, see image.
If you have then the log will be in this location, C:\Documents and Settings\All Users\Application Data\Alwil Software\Avast5\report\Select folder to scan.txt (this is for XP, other OS and you would have to find it in their equivalent location to docs & settings.