Dear all, I have Windows 2003 cluster server with Microsoft SQL Server 2005 - 9.00.1399.06 (X64) and regularly it is loging an error Event Type: Error Event Category: (2) Event ID: 3315 Date: 11/28/2011 Time: 4:38:35 PM User: N/A Description: During rollback, the following process did not hold an expected lock: process 10 with mode 8 at level 2 for row Rid pageid is (1:599823) and row num is 0x0 in database 'userdB' under transaction (1:1763464765). Restore a backup of the database, or repair the database. Event Type: Error Event Source: WinMgmt Event Category: None Event ID: 10 Date: 11/28/2011 Time: 4:56:04 PM User: N/A Description: Event filter with query "select * from __InstanceModificationEvent within 10 where TargetInstance isa 'Win32_Service'" could not be (re)activated in namespace "//./root/Microsoft/SqlServer/ComputerManagement" because of error 0x80041010. Events may not be delivered through this filter until the problem is corrected. Is above error are due to Service pack problems or some thing else related storage ? Thanks in advance.