I suggest:
- Schedule an avast! Boot time scanning…
- If you can’t, or do not want, boot on DOS and run F-Prot or BitDefender for DOS from a CD
You can try avast! Virus Cleaner Tool
- Clean your system (make sure of this)
- Please, tell us what files are into the Chest (could avast! make a list of them?)
- Try to restore the files to their original place (they will remain in Chest until you delete them).
- Delete the files from Chest.
- Uninstall avast! if you want…
Hope this help (like Pavel says everytime ;D)