I had similar issues with a home-rolled desktop(nothing ridiculous! intel CPU, amd GPU, adaptec raid card, stack of ram. No old or weird hardware) and eventuall

I had similar issues with a home-rolled desktop(nothing ridiculous! intel CPU, amd GPU, adaptec raid card, stack of ram. No old or weird hardware) and eventually just gave up and sold the entire lot. The last straw for me, after many update issues, is when it decided to update on its own in the middle of the night and then refuse to boot due to some date/time mismatch error killing the windows activation so much it wouldn't even start up beyond the error message. I googled it, and it ended up being faster to reinstall than fix since i had an install USB on hand.(it was some huge mess of "mount the boot drive on another system and then...") I just use my(pre-current design/mk1 retina) macbook pro with the same monitor at my desk now