Problem

As a best practice in the industry, a DBA often has two logins that are used to access SQL Server; one is their normal Windows login and the other is an admin level login account which has sysAdmin rights on the SQL Server boxes. In addition most of the time the SQL Server client tools are only installed on the local desktop and not on the SQL Server Production Box. In order to use the different login to connect to SQL Server using SSMS you need to use the “Run as” feature. What do you do in the case of Windows 7 or Windows Vista where you can’t find the Run As Different User option.

Solution

http://www.mssqltips.com/sqlservertip/2617/how-to-use-runas-command-for-ssms-if-option-does-not-exist/