I'm new to SQL Server, and have been following this tutorial I carefully followed all the steps, but when I try to connect to the database from the other computer, I get the error "Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. (Microsoft SQL Server, Error: 18452)" What steps do I need to take to fix this? Thanks (I'm using SQL Server 2008 R2 on both the machines)