After updating, whenever I start the service of the server in configuration manager, it always stops then.
And I found the error in the log
2013-04-13 19:08:19.63 spid7s Error: 15174, Severity: 16, State: 1.
2013-04-13 19:08:19.63 spid7s Login '##MS_PolicyEventProcessingLogin##' owns one or more database(s). Change the owner of the database(s) before dropping the login.
2013-04-13 19:08:19.63 spid7s Error: 912, Severity: 21, State: 2.
2013-04-13 19:08:19.63 spid7s Script level upgrade for database 'master' failed because upgrade step 'sqlagent100_msdb_upgrade.sql' encountered error 15174, state 1, severity 16. This is a serious error condition which might interfere with regular operation and the database will be taken offline. If the error happened during upgrade of the 'master' database, it will prevent the entire SQL Server instance from starting. Examine the previous errorlog entries for errors, take the appropriate corrective actions and re-start the database so that the script upgrade steps run to completion.
2013-04-13 19:08:19.63 spid7s Error: 3417, Severity: 21, State: 3.
2013-04-13 19:08:19.63 spid7s Cannot recover the master database. SQL Server is unable to run. Restore master from a full backup, repair it, or rebuild it. For more information about how to rebuild the master database, see SQL Server Books Online.
2013-04-13 19:08:19.63 spid7s SQL Trace was stopped due to server shutdown. Trace ID = '1'. This is an informational message only; no user action is required.
Can anyone pinpoint why this is happening?
As I cannot start the server of SQL server, I cannot connect via management studio and edit anything. How can I edit, for example, the owner of the database?