If you have every wondered how to remove a Windows update via WSUS this should help;
- Open the WSUS MMC console and connect to your server
- Expand Update Services => Server Name => Updates
- Right-click All Updates and select Search
- Enter the kb number of the update you would like to remove and press Find Now
- Right-click the update and select Approve, Status Report is also useful to see how many computers still have the update installed
- Right-click either a specific computer group or All Computers and select Approved for Removal and then press OK
