Windows 10 missing application repaints

Question

I'm seeing many applications missing their screen repaints, e.g., popup menus come up blank until I mouse over them, Explorer selection not painted when I click on an item, Event Viewer not repainting after a scroll unless I resize the frame, etc.

Basically same problem as described in 2017's https://answers.microsoft.com/en-us/windows/forum/all/windows-10-issue-screen-is-not-redrawn-properly/d0fcf284-0066-4fa0-b8f8-54f93e9a7d32, except that I am running a single monitor. I believe this started when I upgraded to an HP 34F Curved (3440 x 1440 - very large pixel count). CPU utilization is low; number of apps open can be as low as one.

Processor Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz 3.60 GHz
Installed RAM 32.0 GB (31.9 GB usable)
Product ID 00326-00778-46923-AAOEM
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display

Edition Windows 10 Home
Version 20H2
Installed on ‎12/‎5/‎2020
OS build 19042.746
Experience Windows Feature Experience Pack 120.2212.551.0

Windows updates are up to date.

Answer 1

Do you experience the same if you opt a Clean Boot or after creating a new user account?

Answer 2

@Lloyd Smith
Hi,

If disabling hardware acceleration is an option for you?

According to you description, download Process Monitor and see what happen when missing application repaints maybe useful.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon

Hope above information can help you.

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Answer 3

I'm not able to reproduce the problem this evening. - this afternoon I had it for several hours across a couple of restarts. Last thing I tried this afternoon was a run of 'SFC /SCANNOW' and then a safe boot at network level with all non-MS services disabled. That env did not exhibit the problem (though resolution there was only ~ 1280 x 1024).

So, when and if this recurs, I will check:

• Does a lower resolution fix the problem
• Is there a non-MS service causing the problem (disable one by one, I guess)
• Does it occur in a new, clean account on this machine

Because scrolling windows are not repainting, using Procmon might not be much fun. But as I said, the machine did not have much CPU usage when the repaints were failing (nor file or disk usage either).

I do not see any setting for hardware acceleration for this graphics adapter.

Thanks.

Answer 4

I've gotten this twice again since original posting last week, both after restarts of Windows. Switching display resolutions down (e.g. 1920 x 1200) fixes it, and problem is not seen after immediately switching back up to 3440 x 1440. This workaround only costs a few minutes of lost time.