Run in command prompt as administrator.
sc sdshow mslldp
Get the string and paste before (A;;CCLCSWLOCRRC;;;SU) and run
sc sdset mslldp [PASTE STRING HERE] (A;;CCLCSWLOCRRC;;;SU)
Add-AppxPackage -Path "C:\Users\MyUserName\Downloads\affinity-designer-2.0.0.msix" -DependencyPath " https://aka.ms/Microsof...