Hi Tech I have recently repaired Avast in the Control Panel but I have a feeling it isn't an Avast problem. As soon as I click on restart Security Center, the little shield with the white cross disappears then immediately re-appears. Thank you for explaining root folder, I thought thats what it was, but wasn't sure, so at least I have learned that. I have never had Symantec on my computer, I never wanted it. For 5 years now I have mainly used Avast and Windows Firewall, much to some peoples dismay. The firewall has never let me down and I have never had a hacker intrude or a virus. I also use AdAware SE Plus, Spyware Doctor, CounterSpy, WinPatrol, SpywareGuard, SpywareBlaster, Asquared, Bibeta occasionally, and Windows own malicious tool. None seem to clash, although I do know Spyware Doctor slows my computer down a lot, so occasionally I un-install it completely.
PS. Since deleting the files in the Repository folder, it has remained empty ever since. Should it have something in it by now?