I have a desktop running Win 10, it was on Win 7 when it developed problems with Google Chrome in June of this year. Even after many scans and tries we could not determine what the problem was. So in the end I upgraded the machine to Windows 10 and things worked great again for a while, including using Chrome. However several days ago I started experiencing startup slowness, very sluggish launch of applications, browsers becoming very sluggish, everything becoming harder and harder to operate, as if something is running in the background. This got worse and worse, and finally yesterday I can no longer run any application - when I launch task manager, I can see that the application is part of the processes running, but it will not actually display on the desktop for me to do anything with it. I try running MalwareBytes Antimalware, FRST, Kaspersky, none of them will appear for me to try and scan the machine. The UAC panel comes on and I click on Yes to allow the app to run, but it won't show up. Any program I try to run now does the same thing. And again, everything is very very sluggish: startup, login, display of desktop - no desktop image or theme, they've somehow been removed, I just get a black desktop now; windows explorer and task manager do work, after long long periods of waiting, but that's about it. I just can't run any scan right now to provide, I hope you can show me a way to get that started.
Here is a link to the process I went through in June trying to resolve the issues the machine had while on Win 7:
Please advise what I should do next to try resolving this problem?
Thank you very much for your wonderful help!