Howdy all,
First, for the record, not trying to defend Avast by any means; in fact, after this whole conundrum, seriously thinking of switching to a different virus-scan.

Thankfully the update seems to have fixed my issue, which is what brought me to this thread in the first place. (Thank God, last thing I needed was to have a virus/malware infection!!!)
However, I will say, for those that are saying they had thousands of files marked as infected due to the false-positive, again, not attempting to defend Avast, I might suggest you may want to peruse further into your system, and there's a few reasons I say that.

1. Known viruses are only found once known and the scan knows what to look for, otherwise certain algorithms and patterns are looked for and that tends to get marked.
2. I have 1.5TB of storage on this system, and only about 150gb or so available, with most of it crammed full with various games from different sources, some videos, several images from random parts of the internet, etc... I ran full scan, AT LEAST five OR MORE different times, and was actually getting annoyed because I kept getting the same false-positive warning, but all five times NOTHING was found.
3. Only thing marked on my scans was performance issue or whatever, but that's due to having various custom-scripts and other configs running on my rig that typically cause most performance checkers to think I'm running below-spec, when if anything, I'm typically smooth sailing. (I have years/decades of system/security/network experience so perhaps that gives me a tiny bit of an edge? *shrugs*)
4. If hundreds/thousands of files are being marked... better safe than sorry, right?

System Specs:
MSI VR-Ready Apache-Pro GE72VR 6RF
Intel i7-6700HQ @ 2.6Ghz (3.5-ish with turbo-config)
Win10 (MEH) & Ubuntu Linux 64-bit
16gb RAM (upgrading soon)
nVidia GeForce GTX 1060 /w 6gb vRam
1.5TB storage


PS - Please excuse my slowness... I'm at a job-site right now that has spotty WiFi at best, and am on my mobile-hotspot which is already at data-cap, thus down-throttled speed, lol.