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Windows 10 Speed Issue

Posted on 2016-07-15
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Last Modified: 2016-07-24
I upgraded this particular computer about three weeks ago. Things have been running fine until today. The user called and said it was running extremely slow. When I got on and looked in task manager it was pulling a constant 50% CPU utilization but it wasn't any one process. I have never seen anything like it. There were about 40 processes and each one was running a constant .8% (some were a tad higher).

SFC did return a few corrupt file and DISM is running now but has anyone seen anything like there? Where several processes at running a constant 1%? Malware scan did not come up with anything.
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Question by:LockDown32
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by:John Hurst
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See if Windows Defender is competing with / conflicting with your antivirus.

In Task Manager, sort by CPU, Something must show up.

Under Options, turn on History for all processes.
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by:LockDown32
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Windows Defender is disabled. I always sort in Task Manager by CPU when debugging speed issues. There is no single major offender just 30-40 small ones that add up 40-50% utilization.

Show history for all processes is greyed out.
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by:John Hurst
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Set up Resource Monitor in Admin Tools and let it run for an hour. Set it for CPU and then see what is coming up there.
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by:pgm554
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You know there was a new set of patches just rolled out right?
If it's fine for 3 weeks and after black patch Tuesday ,it's not...
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by:LockDown32
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It's Friday :) She said it was working fine until this morning.
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by:John Hurst
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The newest updates are on my Windows 10 machines (several). What did Resource Monitor tell you after an hour or so of tracking?
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by:LockDown32
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The eact same thing that looking at the processes did. High CPU usage but no one single offender. Almost everything is running a constant .8%
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by:John Hurst
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What did you upgrade from (probably Windows 7)?

Have you tried SFC or DISM?  I think you now about these tools.
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by:LockDown32
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I started in with SFC and DISM at the very start of the question. I can't get DISM to run correctly. It keep returning error 0x800f081f. Very frustrating error to debug.
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by:pgm554
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> She said it was working fine until this morning.

I've had patches not destroy anything until after a couple of days in the past.

I'm not a big fan of the M$ forced patching on W10.

Never rule out a M$ patch as a culprit.
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by:John Hurst
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If you go to Windows Updates, Advanced options, Update history, you can uninstall recent updates to see if, indeed, recent updates have caused the issue.
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by:David Johnson, CD, MVP
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disk usage is always a question when users report slowness
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by:John Hurst
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True about disk usage and yes, I have seen that. But disk usage does not usually also cause high CPU.
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by:nobus
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it can even be a disk problem
i would run a diag on it -  and as you know, i use the UBCD
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LockDown32 earned 0 total points
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Windows was corrupt. DISM fixed the corruption:

1) Download the ISO from Tech Bench. The ISO created with the Windows Media Creation Tool will not work. It is a esd and supposedly only a wim will work.

2) The ISO needs to be mounted. Technically mounted. Copying the files somewhere and running DISM specifying where you copied them doesn't seem to work.
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by:LockDown32
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It was the solution
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