Windows 11 - cannot scroll by clicking scroll arrows

A friend has issues scrolling by clicking on these little arrows:



The touchpad scrolling works fine, but the page won't move if you click these. Any idea what settings are responsible for this?

Good to have you on the forum. No, I've never seen a setting. The scroll bar is part of explorer. I must ask what will sound like a dumb question, but do the scroll bars work with a mouse? If they do, it's not Windows.

What I would suggest is to test in clean boot. . If it doesn't happen in a clean boot, you have some software conflicting with Windows. Brink's procedure will help you weed out which one. Perform a Clean Boot in Windows 11 to Troubleshoot Software Conflicts Tutorial

If that doesn't narrow it down, check for file corruption.
Open a command prompt as administrator and type sfc /scannow
Pay attention to the scan results to see if SFC found anything it could not repair. If it found corruption it could not fix followup with this command (note the spaces)
dism /online /cleanup-image /restorehealth
Restart computer

(Note-you can follow up with another sfc /scannow command to make sure that dism repaired the files)

If that makes no difference either, a repair install should do it. Repair Install Windows 11 with an In-place Upgrade Tutorial