1
Click your Start Button, then just type powershell, on the resulting list, right click PowerShell and select 'Run as Administrator'.
Paste this into PowerShell and press Enter.
Get-AppxPackage Microsoft.YourPhone -AllUsers | Remove-AppxPackage
2
When that process completes, close PowerShell, restart (not shut down) your PC and download the latest version of the Phone Link app form the Microsoft Store.