pc 100% disc issue - impossibly slow. windows pro 10 on dell optiplex

dalchina said:

Hi, there are many possible causes- noted System is responsible for the high disk usage.

Also noted you said


a. Please post a screenshot of your Update History.
b. How much free space do you have on C: ?

c. Please boot to Safe Mode. Check your disk usage and post the result.
Hopefully it will then be low.

d. If so, run
chkdsk c: /scan
from an admin command or Powershell prompt
and post the result. (Note this is just a test- it fixes nothing).

e. If this fails, run
chkdsk c: /f
Your PC will probably need to reboot, and this could take a long time to complete.

To examine how System is using your disk try Process Explorer (free from MS):
Attachment 229000

I restarted in safe mode and activated task manager. Unfortunately the only information provided was CPU (0-1%) and MEMORY (15-16%) Did I do something wrong here?

CHK SCAN:


scan didn't seem to fail so I skipped the next step but I did run the process registry:


I think I'm caught up now. I hope you are still with me. sorry it took so long.

- - - Updated - - -

dalchina said:

Thanks. The first tells me you are installing an update of some kind. Please post a screenshot of your Update History to see if this gives a clue- for example, if an upgrade fails, it repeated downloads and tries to install- which is frustrating.

The second looks puzzling as the disk usage is 100%, but little shown.

The third- service host- needs expansion, and probably a tool like Process Explorer to find out what is actually happening. svchost.exe does many things.

Perhaps the update has now completed - what is your Windows version?
Win key + r, winver

At least it's not always 100% of anything..

Still waiting for you to address my post #8, which primarily relates to the start of dealing with SFC /SCANNOW failing.

windows 10 pro. version 1803. build 17134.590 (2018

Seems Windows Update is failing and you're on 1803.

I restarted in safe mode and activated task manager. Unfortunately the only information provided was CPU (0-1%) and MEMORY (15-16%) Did I do something wrong here?

Figures sound good- not sure what you were missing without a screenshot.

chkdsk passed. Good. And from Speccy, disk is probably good.

Process explorer- curiously the screenshot shows very low CPU usage... was that in normal or safe mode?
- this would only be useful if CPU usage were high...

Noting

the system file checker did say that it found corrupt files and that it was able to fix some but some were not able to be fixed.

and that Windows Update seems to be failing, and that the disk is good, I suggest you try an in-place upgrade repair install.

Alternatively you could attempt to upgrade, but I think for now, try an in-place upgrade repair install.
Repair Install Windows 10 with an In-place Upgrade | Tutorials
This keeps all progs, data and most settings.

Short instructions:
Download (1803) iso
rt click, click Mount (Mount will not be avaialble if you have associated iso's with another prog)
Open the new drive letter, double click setup.exe, follow the prompts.

You're correct that task manager in S Mode doesn't show disk activity:

(I did that using PrtSc, then Paint to crop it and save it as an image file).

Suggest you proceed with an in-place upgrade repair as above.

Have you seen excessive CPU use again?

I suggest you opt NOT to receive updates during that- you can even disconnect your internet if you wish.