Those are all Spybot backups (in case you ever want to reinstall your spyware, I suppose). I think Spybot password-protects and/or encrypts the backup files it makes when it scrapes the crud from a system. Either would explain why Avast is unable to scan them.
Just as an aside, how much stuff do you have auto-starting? You have lots of stuff in the tray, about half of which I don't recognize. Do you really need all that stuff running?
-Rich