Malwarebytes, that's all. Other than that, I've been relying on Windows Defender.
Some months ago, maybe 6 months ago? I had a Windows Update problem, below is the link to the TSF thread I had at that time. Maybe something significant now, didn't get installed correctly back then? At the time, it seemed (to me....I don't know much) that it was maybe related to my Epson printer software, Adobe, or some interaction between those two. I currently have a different Epson printer (also it supposedly can fax email and otherwise interface with the web, but I only ever scan, copy, print and never use wifi for either the desktop or the printer) which has somewhat different software. That's why I particularly noticed Adobe Acrobat / Cloud also updated the day this began. Earlier in the current problem, I uninstalled Adobe and tried running Windows Update without it, which wasn't successful. I can try that again?
TSF thread from six months ago that I started at the time--
https://www.techsupportforum.com/threads/last-update-didn’t-work.1248211/