When trying to connect to a server in Management Studio (specifically 2008), there is a field where you enter the Server name. That field also has a drop-down list where it
Here is simpliest way to clear items from this list.
there we go.
For SQL Server 2012 Management Studio, this file has moved. It is now located at:
C:\Users\<username>\AppData\Roaming\Microsoft\
SQL Server Management Studio\11.0\SqlStudio.bin
From the Command Prompt (Start \ All Programs \ Accessories \ Command Prompt):
DEL /S SqlStudio.bin