How to exclude Windows Updates with WSUS Offline Update

1. Go to the "exclude\custom\" folder of your WSUS Offline Update installation.
2. Make/create a file named "ExcludeList.txt" and another named "ExcludeListForce-all.txt"
3. Open both files in a text editor and write inside all the updates you want to exclude, one per line in lowercase.
4. That's it, WSUS Offline will no longer download or install those updates.