I just noticed my avast! stopped completely
"Fix now" doesn't work, but "Run now" (sorry I don't know how this called in English, it sit under "Fix now" button) fixed my problem.
I have slept my PC and wake up about an hour ago... I didn't notice.
This is my first time I get such message.
I hope this happened by accident. I report this just in case (this is pre-release build...).