Hi
a) service account login name changed? password invalid, accont locked etc? (try admin account 1st then move back to other user name)
b) messages in the event logs?
are you logged in as admin when installing the instance? (try this).
Cheers
Ck
Chris Kempster
http://www.chriskempster.com
Author of "SQL Server 2k for the Oracle DBA"
Chris Kempster
www.chriskempster.com
Author of "SQL Server Backup, Recovery & Troubleshooting"
Author of "SQL Server 2k for the Oracle DBA"