param([switch]$WSUS)

## Delete any existing folder from a previous execution of this script
If ( Test-Path "${Env:WinDir}\SoftwareDistribution.old" ) { Remove-Item "${Env:WinDir}\SoftwareDistribution.old" -Recurse -Force }

## Stop Background Intelligent Transfer Services and Windows Update
Stop-Service BITS
Stop-Service wuauserv

## Rename the SoftwareDistribution folder, forcing Windows Update to recreate all metrics and redownload all updates
Rename-Item -Path "${Env:WinDir}\SoftwareDistribution" -NewName "${Env:WinDir}\SoftwareDistribution.old" -Force

## Start Windows Update and Background Intelligent Transfer Services
Start-Service wuauserv
Start-Service BITS

## Delete SoftwareDistribution.old from this execution of this script
If ( Test-Path "${Env:WinDir}\SoftwareDistribution.old" ) { Remove-Item "${Env:WinDir}\SoftwareDistribution.old" -Recurse -Force }

## If using WSUS, reset authorization with server and detect new updates
If ( $WSUS ) { Start-Process "${Env:WinDir}\System32\wuauctl.exe" -ArgumentList "/resetauthorization /detectnow" }