KB934525 is required to fix a vunerability in Sharepoint. Read security bulletin for more information.

Information about KB934525 can be read at http://support.microsoft.com/kb/934525

Many people have reported that their SharePoint broke after installing this security update. This can happen if the security update fails to install properly. People have reported different issues and errors. One of the common errors if this update fails is:

'SharePoint_AdminContent_GUID' on SQL Server instance 'XXXXXX\Microsoft##SSEE' is not empty and does not match current database schema.

Another error is:

The specified SPContentDatabase Name=SharePoint_AdminContent_GUID Parent=SPDatabaseServiceInstance Name=Microsoft##SSEE has been upgraded to a newer version of SharePoint. Please upgrade this SharePoint application server before attempting to access this object.

How can you fix these errors?

First, restart the SPWebService. You can do it manually from the "Services" mmc. You can also run the stsadm command to restart this service.

Then, run the following command:

PSCONFIG -cmd upgrade -inplace b2b -wait -force

You must perform b2b (build to build) upgrade.

Hopefully this will fix your database problem.