Hi, and thanks for reaching out. My name is Bernard a Windows fan like you. I'll be happy to help you out today.
I understand the issue you have, there is nothing to worry I am here to help, can you still open the start menu? or navigate on the PC? while waiting for the response, I suggest following the steps below:
Method 1. Repair built-in apps such as Taskbar:
Open Powershell with Admin or CMD with Admin (Press Windows key + X then click Windows Powershell(Admin))
Copy the line of command to Powershell then press enter:
Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Then hit Enter, once the process is done, restart the PC and check.
If none will work from the above solution, I suggest doing an in-place upgrade wherein it will upgrade the device to the latest version and repair all issues without deleting any files.
Kindly follow the steps from this link:
https://answers.microsoft.com/en-us/windows/for...
Let me know how it goes and I hope that helps.
Bernard