My project's backend is SQL Server 2005 and I need to install this to customers' systems.
The problem is when someone logs onto the computer, they can easily access the SQL Server with Windows authentication. How can I protect the SQL server from local logins?
It's not possible to stop Windows local admins from accessing SQL server - see https://dba.stackexchange.com/questions/34684/restrict-access-for-windows-administrator.
By default, users who are not local admins will not be able access SQL Server with Windows Authentication. So the solution for you is to ensure your users are not local admins.
