I have a Windows 2000 system with SP4 Installed. Windows update is offering Windows Rollup 1 for SP4. The install fails. I downloaded the update to try a manual install and get an error the the system needs to be restarted froma previous update or installation before the rollup can be installed. Restarting the system does not resolve the rollup installation issue. The error code is 8007f02a. I think the update is KB91861.