Update on the situation, I have found a temporary fix, basically when Avast DU says you need to update the Gaussian Mixture Model, I updated it, BUT went out and found a newer version from 12/17/18 which is digitally signed. I even redownloaded the PCIe Controller (x16) - 1901 driver, version is from 1/2/2017 (like Avast DU and is also digitally signed) and installed both, rebooted and the issue hasn't come up since.