SQL agent start error

Hi,

I am not able to start sql agent service. Please anyone help.

[000] Unable to connect to server '(local)'; SQLServerAgent cannot start
[298] SQLServer Error: 18456, Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'. [SQLSTATE 28000] 
[382] Logon to server '(local)' failed (DisableAgentXPs)
[098] SQLServerAgent terminated (normally)

Thanks,