My SQL Server Management Studio when connecting to a database, disconnects me from the server I'm connected to after a few hours. My old installation of SSMS did not do this. This is not a problem on the database server as this is a new machine with a new installation of SSMS. My old machine does not time out my login. There must be a setting somewhere in SSMS. Does anyone know where it is?
Check your power settings as if your machine goes into a low power mode it may drop network connections.