As far as I can see, it found a Trojan.Multi.GenAutorunBits.a in the System Memory. The Report file seems to be encrypted but you wanted it, so I assume you can read it
I changed the extension of the file from .enc1 to .txt because I was not allowed to upload the .enc1.
It seems that the warnings from Avast stopped today around 15:00 hours CET. I had Avast in Quiet mode so I didn't realise that tonight until now. That's strange...