Try this step for resetting the taskbar from powershell.
- Press Windows key + X, select Windows Powershell (Admin)
- Paste this command and press enter:
Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)AppXManifest.xml"}
- Close Powershell
- Press Windows key + E, then go to this file location:
C:/Users/your_username/AppData/Local/
- Locate and delete TileDataLayer folder
- Check if your taskbar is now working.
If that didn't resolve the issue, try these further steps:
- Press Windows key + X, select Windows Powershell (Admin)
- Paste this command and press enter:
Get-AppxPackage *Microsoft.Windows.ShellExperienceHost* | foreach {Add-AppxPackage -register "$($_.InstallLocation)appxmanifest.xml" -DisableDevelopmentMode}
- Paste this command and press enter:
Get-AppxPackage Microsoft.Windows.Cortana | foreach {Add-AppxPackage -register "$($_.InstallLocation)appxmanifest.xml" -DisableDevelopmentMode}
- Reboot and check if the issue still persists.
Let me know how it goes.