I had 7 undetected malwares.
I have some, too, because I visited a site, and after that I read in a forum that the site contains malicious codes.
Now, ESET Online Scan and Windows Defender will run in my computer. If they won't find anything, I don't know what to do (I ran MBAM yesterday)
I would like avast if it had better detection. But is hasn't. Unfortunately, maybe, I will use another AV that is really protect my PC.