let's just rattler them off and you can shoot at them.

1. BIOS isn't current. Less seasoned PC builders balk at this, might tell us "it worked before."
2. There is a bit coin miner rogue app installed. Hard to spot at times but these can attach to Chrome addons and even run when you hit some sites. Pretty awful stuff.
3. Too many Seagate drives with read errors. Have to see the smart values. What works for me is the Web Speccy report. Here's how. https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web

4. Web Speccy report. It let's us see so much that often we find stuff.

5. Be sure to turn this next thing off.
Read https://www.howtogeek.com/224981/how-to-stop-windows-10-from-uploading-updates-to-other-pcs-over-the-internet/