here is the SQLAGENT log . is it related to DisableAgentXPs ? I tried all accounts , Network, Local System and Local service, failed. I do remember I have disabled SA account and created my own account. I can't use Windows Authentication to log in, only SQL server authentication works now. Thanks2011-11-29 22:33:03 - ! [298] SQLServer Error: 18456, Login failed for user 'NT AUTHORITY\NETWORK SERVICE'. [SQLSTATE 28000] 2011-11-29 22:33:03 - ! [000] Unable to connect to server '(local)'; SQLServerAgent cannot start2011-11-29 22:33:03 - ! [298] SQLServer Error: 18456, Login failed for user 'NT AUTHORITY\NETWORK SERVICE'. [SQLSTATE 28000] 2011-11-29 22:33:03 - ! [382] Logon to server '(local)' failed (DisableAgentXPs)2011-11-29 22:33:04 - ? [098] SQLServerAgent terminated (normally)