📎 AI Summary:
The thread discusses a recurring error related to the Desktop Window Manager (dwm.exe) that doesn't significantly impact Windows 10 performance. The original poster seeks advice, mentioning that the error appears intermittently and is visible in the Reliability Monitor and event viewer, but no critical system issues are present. Contributors suggest diagnostic tools and commands like chkdsk, DISM, and mini dump capture to identify the root cause, with no definitive resolution provided yet; the overall tone is one of troubleshooting and maintenance.
holdum333

holdum333

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Thread Author #1
Hi Anyone have a suggestion for this error?? I get this every once in awhile.
Doesn't seem to affect my W10 operation, but would like to know what it's all about!
Thanks!
An image from 'Hi Anyone Have any Suggestions for this??'. Windows error report showing dwm.exe stopped working due to CoreMessaging.dll fault.
Microsoft Defender: No threats detected Scan details
 

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Solution
Neemobeer
A 0xc0000005 exception is an access denied error. AV or Windows corruption are two common causes of this exception.

dwm is the Desktop Window Manager. I believe the core messaging dll is for handling messages to windowed applications (an example of a message would be if you click a button that is considered a click message) You may want to try and repair your windows install.

  • Open an elevated command prompt and type chkdsk /f /r when prompted to run it at next reboot press Y
  • Then run from the same prompt DISM /Online /Cleanup-Image /RestoreHealth
  • Reboot and let the check disk run which could take a while.
See if those commands repair anything.
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Neemobeer

Neemobeer

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#2
A 0xc0000005 exception is an access denied error. AV or Windows corruption are two common causes of this exception.

dwm is the Desktop Window Manager. I believe the core messaging dll is for handling messages to windowed applications (an example of a message would be if you click a button that is considered a click message) You may want to try and repair your windows install.

  • Open an elevated command prompt and type chkdsk /f /r when prompted to run it at next reboot press Y
  • Then run from the same prompt DISM /Online /Cleanup-Image /RestoreHealth
  • Reboot and let the check disk run which could take a while.
See if those commands repair anything.
 
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Solution
holdum333

holdum333

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Thread Author #3
Hi Thanks Noeemobeer! I have ran the chkdsk. No integrity errors where found, so did not run DISM.
I run Windows Defender with MBAM pro. I really can't see any ill effects and I only get this error once in awhile. I haven't been able to pin down what I'm doing when I get the error. I'm running W10. This error shows up in my Reliability Monitor and event viewer!
Thanks for your help! I appreciate you! Was hoping someone here were getting this error and found a solution!
 
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Neemobeer

Neemobeer

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#4
You can install this. Link Removed set it up for a crashing process and capture all instances of dwm.exe for exception 0xc0000005 and have it capture mini dumps. Zip and upload those mini dumps and I can take a look at them.
 
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holdum333

holdum333

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Thread Author #5
Hi Neemobeer. I'm not having any BSOD. I have ran sfc /scannow and no integrity errors where found.
I really feel like my PC is maintained well. Jut this one little annoying error happens maybe twice a month.
Thanks for your reply. I'll keep looking for a solution and post back here. If you have more suggestions, please post them.
I'm leaning to having several Tabs open. Do you think that might cause this.
Thanks!
 
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Neemobeer

Neemobeer

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#6
The tool I listed above with generate a memory dmp file similar to a BSOD memory dump and can help pinpoint the problem.

It dumps the process memory. It doesn't crash your computer.
 

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