On upgrade from v5:
- C:\Documents And Settings\All Users\Application Data\Alwil Software\Avast5\report (2000, XP)
- C:\ProgramData\Alwil Software\Avast5\report (Vista, 7)
On clean v6 install:
- C:\Documents And Settings\All Users\Application Data\Avast Software\Avast\report (2000, XP)
C:\ProgramData\Avast Software\Avast\report (Vista, 7)