Login fail for Sql User

Error: server: msg 18452, level 16, state 1 [microsoft][odbc sql server driver][sql server]login failed for user 'user_name'. Reason: not associated with a trusted sql server connection

Solution: Open Sql Server Enterprise Manager, go to SQL Server Group -> Choose the server -> right-click, Properties -> choose tab Security -> Choose Sql Server and Windows for Authentication, then click OK, and don't forget to restart the service to make sure the new settings work.