After installation of SQL Server 2005; Observed that SQL Server performance counters missing.
Below Query returns Zero rows.
select * from sys.dm_os_performance_counters
select * from sysperfinfo
Look at the setup log and search for error 3409, "Reinstall sqlctr.ini for this instance, and ensure that the instance login account has correct registry permissions" This denotes that performance counters were not enabled. The errors immediately prior to the 3409 listing should indicate the root cause for the failure of performance counter enabling.
For more information about setup log files, see How to: View SQL Server 2005 Setup Log Files