After all, it just sits in the background and consumes very little memory (less than 50 to 100 MB) all the while doing the work as efficiently as possible.
However, starting from Windows 7, the desktop window manager is deeply integrated into Windows and can no longer be disabled individually.Ī vast majority of Windows 10 users never need to know or worry about the Desktop Window Manager process. This allowed users to disable it to improve system performance.
#DWM EXE WINDOWS 10 UPDATE#
We suggest you to disable or update this specific HPP Printer Control application and let us know if the issue exists.Back in the Vista days, the desktop window manager is a separate service to handle the animations and other effects. If you check the first value which 41012 which is the thread ID for this process, followed by CPU threshold (71.99) for 6 seconds and then followed by 6,070 which is IOPS count, and finally the wait time (in secs) that is exactly 16secs.ĭWM is just a medium for rendering between system GUI and the application. We then matched the DISK Usage sample and CPU (Actual Usage Samples) from WPR and see that DWM.exe was constantly having high IOPS due to backgroundhost.exe application which then led us further to find the exact application causing the issue.īackgroundhost.exe is the consent windows application that stays in the suspended state unless used by the application itself. While checking the stack tree for DWM.exe application we were able to see that Direct3D Image Rasterizer DLL which is D3D10Warp.dll is the file being used by DWM and next comes DWMCore.dll which is the source file for DWM.exe Out of these 3 were under normal usage, 1 was showing as low and there were two processes which were showing as high. There are a total of 6 DWM.exe processes which are active when the trace was captured. This was the reaction by MS support after sending them some log files of the affected host:
#DWM EXE WINDOWS 10 DRIVER#
The problem was caused by soms HP Printer Driver utility on the WVD host, causing DWM.exe to use excessive CPU.Īfter deleting this printer driver, the issue was gone.
Yes, we did create a case at MS support, and it has been solved. It also happened once to an administrator RDP session (connected via classic RDP, not via WVD).ĭoes anyone else have this problem? It seems our customers who are still running WVD Windows 10 v1903 are not experiencing this.
#DWM EXE WINDOWS 10 FULL#
Just default settings, maximum 2x full HD monitor. We contacted these most-reported users, but they have no "special" client machines like 200% DPI, 4K displays, non-Windows clients, dark theme enabled etc.
It seems to happen to some particular users most of the time (but sometimes also to random users once). When the user logs off and logs on a again, problem seems to be fixed for a random period of time. We tried using a different VM size (Intel / AMD CPU), no effect. Connecting / disconnecting does not seem to trigger it or stop it.
It's happening in connected and also in disconnected sessions. When doing a CPU trace via Windows Performance Analyzer, we see that DWM.exe is using all this CPU via d3d10warp.dll. In our monitoring, we see spikes that DWM.exe uses 25% percent constant CPU (so 1 of the 4 cores in the VM) for a couple of hours, then it suddenly stops again. We now have multiple customers where DWM.exe uses too much CPU randomly.