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Windows 10 keeps navigating upwards on the Start Menu and on the settings menu, but not in other apps

I have an unusual problem on my Windows 10 device. When I try to use the Start Menu or the Settings menu, the system behaves as if I’m constantly holding the up arrow key.

Here’s a video of this behavior. In this video I open the Start Menu and scroll downwards rapidly. The menu keeps jumping back to the top. I practically can’t run any applications whose name starts with a letter beyond “A”.

Here are some relevant facts:

  • This does not affect all applications. It only seems to affect certain Windows apps, including the Xbox game overlay. My Web browser works fine, for instance.
  • Rebooting did not resolve the issue.
  • The Scroll Lock key is off.
  • The issue occurs even if I unplug my mouse, keyboard, and gamepad.
  • I did not recently update my system configuration.
  • This issue started happening today, a few hours before I wrote this post.

Specifics of my Windows edition are as follows:

Edition         Windows 10 Pro
Version         21H2
Installed on    ‎12/‎24/‎2021
OS build        19044.1645
Experience      Windows Feature Experience Pack 120.2212.4170.0