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windows explorerrunning slow and using too much cpu


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5 replies to this topic

#1 joshteich123

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Posted 04 April 2017 - 10:46 AM

Hello my name is Josh,
My computer has the following issue,
When i scroll through files in windows explorer it runs very slow and the cpu usage for explorer spikes. This problem occurs 
when i run windows in safe mode also.
I used sysinternals process explorer and found that the following thread is what's overusing the cpu
 
SHCORE.dll!SHReleaseThreadRef+0x90
 
Thank You
 
I also attached a screenshot of the problematic thread selected and it's thread stack opened in process explorer.
 
Attached File  problem thread.jpg   67.22KB   0 downloads
 
Attached File  thread stack.jpg   45.58KB   0 downloads


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#2 FreeBooter

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Posted 05 April 2017 - 03:07 AM

I would like you to check the system integrity of your Windows OS installation.
 

  • Please right click the Windows logo (formerly the start button) at the bottom left of your screen.
  • Please select  "Command Prompt (Admin)"
  • Please type the following command and press the <Enter> key: sfc /scannow  (Please note that there is a space between 'sfc" and "/scannow".)
  • It should take about 20 minutes to run, if there are no serious errors.
  • If the System File Checker reports that some errors were fixed, but some remain; please reboot your computer and run the System File Checker from an Administrator Command Prompt, again.
  • If the System File Checker again reports that some errors were fixed, but some remain, please reboot your computer and run it a third time.
  • If "Resource Integrity Violations" (errors) are reported that could not be corrected, or were not corrected after a third SFC run, then please navigate to the folder: C:\Windows\Logs\CBS and copy the file "cbs.log" to your desktop immediately.  I am asking you do that because that file is dynamic, so I want to be able to examine a copy that is unchanged from the time that the System File Checker was run.
  • If there are errors that couldn't be corrected, let me know and I will provide you with instructions as to how to upload the file


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#3 joshteich123

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Posted 05 April 2017 - 07:05 PM

 First of all thank you very much for taking time to help me out.

 
I ran the scan as you told me three times with rebooting in between and all three tomes it came up with the following message: 
Windows Resource Protection found corrupt files but was unable  to fix some of them.....
 
Here's a screenshot of the command prompt,
Attached File  scannow results.jpg   43.54KB   0 downloads
 
It looks like the scan may have fixed the problem because so far windows explorer is running fine.
 
I did copy the cbs.log file immediately after the third scan and I could upload it.
 
Again thank you for your help.


#4 FreeBooter

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Posted 06 April 2017 - 12:04 AM

Please execute below command:

dism /online /cleanup-image /restorehealth

After above command finish execute below command to make sure corrupted system files are repaired.

Sfc /Scannow

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#5 joshteich123

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Posted 06 April 2017 - 02:28 PM

I ran the restore command and then the scan as you said and this time the scan showed that there are no errors.
Also the issue has not occurred again.
 
Thanks so much for your help.
 
Here are the results:
 
Attached File  restore and scan results.jpg   48.16KB   0 downloads


#6 FreeBooter

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Posted 06 April 2017 - 06:09 PM

You are very welcome!


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