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After exiting a remote desktop session, cpu load goes up (dwm.exe) until next login

When I access another Windows 10 PC via remote desktop and then exit the remote desktop session, the CPU load goes up. It is DWM.EXE that causes it.

What I did to exclude other causes:

- scanned for viruses (yes, DWM.EXE is the original one from MS)

- made sure no magnifier was active (Google proposed this)

- made sure no screen saver is active and nothing else is on my lock screen

- made sure the gfx driver (Intel integrated) is up to date

dism /online /cleanup-image /checkhealth

dism /online /cleanup-image /scanhealth

sfc /scannow

chkdsk c: /f

do not show any problems.

Today I tried a second system as RDP target: Same problem! Could this be a bug? Can anyone else please try it, too? I don't know since when the problem occurs. Could be since 1903 (this is the version I use on both systems).

This is how it looks when I log the CPU loads:

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Hi kriegste
Greetings! I am Vijay, an Independent Advisor. I am here to work with you on this problem.

You should report this to Microsoft so that Microsoft developers should look into this to consider this for a fix.

Windows Key+F
Submit your feedback

After posting your feedback, share the link here so that I can upvote your request,

Do let me know if you have any more question or require further help.
Sincerely yours,
Vijay A. Verma @ https://excelbianalytics.com

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Nothing happens if I hit Windows+F. Is there another way to submit feedback? An online form? I thought this support forums is monitored by developers, too.

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Type feedback in Cortana earch and hit Feedback hub
If this doesn't come up, install it from
https://www.microsoft.com/store/productId/9NBLG...
Sincerely yours,
Vijay A. Verma @ https://excelbianalytics.com

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https://aka.ms/AA5c116

I just copied the text into a feedback issue. I am using the German version, though...

Oh, and one more thing: Maybe I was not clear enough, but the problem occurs on the remote (target) system of the RDP connection (after the RDP connection is closed, but before any new logon).

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Different user, same problem:
https://social.technet.microsoft.com/Forums/it-IT/fc9ffe13-47d3-47ac-a1fc-c247d8f4ca8f/utilizzo-cpu-elevata-quando-si-esce-da-rdp?forum=win10itprogeneralIT#61fb43a6-1726-4e35-9ea8-74bc268dbd79
(Italian)

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Is this being worked on? The issue persists in the lastest update.

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Is this being worked on? The issue persists in the lastest update.

I can no longer reproduce the error, I had to format it with release 1809, it was impossible to keep it like this. I had many other colleagues with this problem and they all rolled back. 

I recommend you go back with a system reset or by formatting if you can. 

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FYI, the issue is still unfixed after the last (friday) cumulative update.

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Having the same issue. Upgraded some Windows 10 1809 VMs on a Hyper-V host (Server 2016) to Windows 10 1903 yesterday. When disconnecting an RDP session (no logout, just disconnect), the dwm.exe of the RDP host surges cpu usage until the RDP session gets connected again. Upgrading Graphics drivers (Intel HD Graphics P630) didn't help.

There are quite a few other reports on the same issue:
english:

https://answers.microsoft.com/en-us/windows/forum/all/dwmexe-high-cpu-one-core-on-target-system-after/dbce0938-60c5-4051-81ef-468e51d743ab

https://www.reddit.com/r/Windows10/comments/c0agnb/1903_dwmexe_goes_to_100_cpu_on_remote_host_after/

https://forums.unraid.net/topic/79611-odd-vm-issue/

german:

https://www.mikrocontroller.net/topic/476003

https://www.heise.de/forum/heise-online/News-Kommentare/Juni-Sicherheitsupdates-sabotieren-Ereignisanzeige-in-allen-Windows-Versionen/OT-Sei-1903-20-CPU-Load-von-DWM-exe-nachdem-RDP-Session-beendet-wurde/posting-34690755/show/

italian:

https://social.technet.microsoft.com/Forums/it-IT/fc9ffe13-47d3-47ac-a1fc-c247d8f4ca8f/utilizzo-cpu-elevata-quando-si-esce-da-rdp?forum=win10itprogeneralIT#61fb43a6-1726-4e35-9ea8-74bc268dbd79

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Any news on this?

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Last updated September 7, 2023 Views 7,468 Applies to: