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Question

CPU 100% utilization after windows update on 12/20/2018.

Dec 21, 2018 3:02PM PST

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?

Discussion is locked

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Clarification Request
Task Manager Can Tell You More
Dec 21, 2018 7:45PM PST

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.

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Answer
What process is using 100% ?
Dec 21, 2018 3:22PM PST

There is an IDLE process that folk post about but that's not it. I tend to not repeat what that is.

Tell more.

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(NT) several instances of run32dll
Dec 22, 2018 6:02AM PST

Post was last edited on December 22, 2018 7:42 AM PST

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Re: run32dll
Dec 22, 2018 7:52AM PST
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many 7%s that add up to 100%
Dec 22, 2018 9:21AM PST

As i stated in my original question, there are multiple instances of the run32dll that each occupy several percent that together add up to 100%.

I have no idea what each individual instance is doing; they look identical in task mgr.

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Do this, research with that.
Dec 22, 2018 9:54AM PST

1. DO THIS: https://www.howtogeek.com/224981/how-to-stop-windows-10-from-uploading-updates-to-other-pcs-over-the-internet/ is a common thing I stop and can help odd PC usage issues.

2. USE THAT: If you can't use Kees' advice about finding out about the process then go get a better process explorer (it's called Process Explorer.) https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer

You could also share a Web Speccy report so that we can see what processes and more are active. How is at https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web

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It was f'ing Webroot
Dec 24, 2018 9:26AM PST

I followed the advice on the link you provided and determined that it was multiple instances of some WebRoot Secureanywhere dynamic link library that was being called repeatedly.

Once I uninstalled Webroot, everything is back to normal. Of course now I'll suffer the wrath of our IT enforcer, but at least I can use my computer.

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Webroot seems to know about this.
Dec 24, 2018 9:42AM PST