I'm trying to use MBSA 2.1 to scan my server to see which patches I need to allpy. But all the servers come back with "The catalog file is damaged or an invalid catalog." on both online and offline scan. The MBSA did work before. I downloaded the latest wsuscn2.cab and wuredist.cab for the offline scan. I also installed windows update agent 3.0 on some of the servers, but they still gave me the same error.I'm running out of iedas. Anyone know how to fix that and why it happens? thanks.