In Task Manager click on the tab where it says 100% CPU. This will make that column list the processes in order of what's using the most cpu power. It's likely that one or maybe two processes are using most of that 100%. Please tell us what those are.
Yesterday, on 12/20/2018, I allowed my computer to apply a Windows update (Windows 10 OS by the way) of which I'd been notified. Immediately after the update, my computer is unusable because the CPU (not the disk) is at 100% utilization. After the 5 minutes it takes to pull up task manager, all I see that looks suspicious are multiple run32dll entries each soaking up several percent of CPU.
The computer was fine before this update, so unless the update itself can be considered as malware, malware is not my problem.
I also disabled superfetch as I've seen that cause problems in my pc before although back then it was related to high disk usage as opposed to CPU usage. In any case, that didn't help my current situation at all.
Does anyone have a suggestion for how I might go about fixing this problem?

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