Why is there a black line above my taskbar? windows 11

Hi, thanks for coming into the forums. I'm also a user like you and I'll be more than happy to help you to the best of my knowledge. You may try the suggestions below.

1. Press on your keyboard the Ctrl + Shift + Esc key to open the task manager, find Windows Explorer under the Processes tab, right-click it then select restart.
2. Run the SFC scan & update all pending updates for your Window, below is the link for the complete guide. https://support.microsoft.com/windows/365e0031-36b1-6031-f804-8fd86e0ef4ca
3. Press on your keyboard the Ctrl + Shift + Esc key to open task manager > click Run new task > type Powershell and hit Enter > right click on the PowerShell from the taskbar and select Run as Administrator. Copy and paste the command below: Get-appxpackage -all shellexperience -packagetype bundle |% {add-appxpackage -register -disabledevelopmentmode ($.installlocation + “\appxmetadata\appxbundlemanifest.xml”)} Hit Enter, once completed, run the command below. Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register ""$($.InstallLocation)\AppXManifest.xml""} Restart your PC.
4. Update your GPU driver. Right-click the Windows start > select Device Manager > Find the Display Adapter and expand it > Right-click and select Update. If that doesn't work, follow the same steps but instead of updating, right-click and select uninstall. Restart your computer.
5. If the issue started after you made changes, you can perform a system restore. On your keyboard, press the Windows key + R then type rstrui then press enter > select Next > Select the restore point/Date that you want to use on your computer click > Next > click Finish.
6. If that still didn't work, reset your PC, click this link for the complete guide https://support.microsoft.com/windows/0ef73740-b927-549b-b7c9-e6f2b48d275e If the reply is helpful, please Upvote and Accept it as an answer.