To re-install WSUS with a clean database i.e. no previous configuration:
Run Windows Powershell as Administrator and use the following commands:
- Uninstall-WindowsFeature -Name UpdateServices,Windows-Internal-Database -Restart
- Post restart, delete EVERYTHING in the C:\Windows\WID\ (for Win 2012 r2) folder.
- Then run the following command to re-install WSUS:
Install-WindowsFeature UpdateServices -Restart
This only works on PowerShell 3 or higher.
I had to run the postinstallation tasks manually via Powershell using the WID db, if using SQL you need to add in sql_instance=
C:\Program Files\Update Services\Tools\WsusUtil.exe content_dir=”<<dir of update download location>>