okay guys, obviously there's one thing that you're not taking into account. The OP is apparently completely unaware that he upgraded "Avira to Avast"
... meaning that I don't even know what he's got currently on his system. You're all hurrying to tell him to clean his system and get rid of Avira completely, which might not be at all what he wants. So please stop that guys; let's wait until the OP finally posts back here and tell us if he wants to keep Avira or switch to Avast. This would be fair to say the least.
Again, I'm absolutely amazed guys by the way this thread has been derailed
... could be that the OP needs an Avast cleaner instead okay? And again stop debating about Avira cleaners, that's ridiculous, and completely off topic. Chances are that the OP downloaded Avast5 while thinking that he was downloading the latest version of Avira alright?