Method One:
- Try a reboot. It might be a glitch in the matrix.
Method Two:
- Open Powershell.
- Which can be done by pressing these 3 keys at the same time – Win+X+A
- Run the following command “sfc /scannow”
- Make sure there is a space between “sfc” and “/scannow”
- Let the process complete and then see if you can use the Start Menu.
Method Three:
- Open Powershell
- Which can be done by pressing these 3 keys at the same time – Win+X+A
- Run the following script: Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}
- Feel free to copy/paste it.
- Wait for the install to complete and then check to see if start menu works.
Method Four:
- Reinstall Windows.
- Make sure to everything to the x-drive before doing this.
- After everything is backed up, begin the re-installation.