Windows 10: This sudden black line under my taskbar might be a driver problem. What troubleshooting...

My normally pristine PC display has been marred by a curious and unwelcome visitor! A thick black line has materialized directly underneath the taskbar, stubbornly refusing to budge. This unexpected development disrupts not only the visual aesthetics of my desktop but also potentially hinders functionality depending on the line's size.The Problem:A thick black line has inexplicably appeared on my PC display.This line sits persistently below the taskbar, potentially obscuring its contents.The cause of this line's emergence is unknown.The Stakes:This visual anomaly detracts from the overall user

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Windows 10 infinite restart black screen


The tutorials provided are just a list of troubleshooting steps. Use only the steps which apply to you.

Since none of the troubleshooting steps here worked, I'd suggest you do a Clean install.

John

 

Sudden black screen

Hi Dorota,

There are several reasons why you received this black screen error on your computer. One of these is a corrupted driver for your display adapter. To troubleshoot your concern with Windows 10, we suggest that you perform the steps
provided on this link.

Let us know if you need further assistance.

 

Small black line at taskbar height

Dear Microsoft community,

I recently bought a second monitor and after playing some Elden Ring (this issue tends to worsen after playing this game OR it's just a coincidence) I got a thin black line in my taskbar. It's the same problem as here: Redirecting BUT with a twist!
Firstly the black line was thin, almost not seeable. Then I started doing the instructions from JhakeSong from the thread above and it not only worsen my problem, the thin line got thick and after this secure boot method, a second line appeared.
I don't know exactly what happened then, but after couple of minutes, the second line vanished (small relief) but the first thick line still persists.

The line now looks like this and stretches through the whole taskbar: imgur.com
P.S. no, if I move the taskbar, the line doesn't change. This has nothing to do with the taskbar (I think) but with something else entirely.

The monitor is a Gigabyte M27Q

I'm using Windows 10 Pro
Version 10.0.19044 Build 19044

Please help.