Windows 10 missing 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

Observe if the problem recurs, if you need to write back here!

A clean installation of Windows can also solve the problem!

I'm sure your answer can help other users with the same problem!

Stay safe! I wish you the best!

Answer 2

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).  I have now done the dism cleanup, as you suggested.

Drivers are up-to-date.  The link solutions refer to MS fixes from 2017 or multiple monitors, so not applicable.

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

Thanks.

Answer 3

Hello Lloyd, how are you?

I am an independent consultant and user like you!

I'm happy to help you!

I imagine you've tried the link solutions you sent, right?

What is the exact model of your computer?

Have you updated the drivers right on the manufacturer's website?

Check Windows for corrupted files

> Open the Command Prompt as an Administrator

> Paste the code below and press the "Enter" key

DISM.exe /Online /Cleanup-image /Restorehealth

> Wait for the check to finish and restart the machine.

> Paste the code below and press the "Enter" key

SFC /SCANNOW

> Wait for the check to finish and restart the machine.

Let me know what happened!