Login failed for user Error: 18456, Severity: 14, State: 11
States 11 &amp; 12 mean that SQL Server was able to authenticate you, but weren't able to validate with the underlying Windows permissions. It could be that the Windows login has no profile or that permissions could not be checked due to UAC. Try running SSMS as administrator and/or disabling UAC. Another reason could be that the domain controller could not be reached. 

Refer to to the below link for more information on Error states.


https://sqlblog.org/2011/01/14/troubleshooting-error-18456