I Cant Connect To Sql Server 2008

i want to create a server based database (mdf) in visual studio 2010 but this error happens :

http://i.stack.imgur.com/gzmTp.png

And this error is in Microsoft Sql Server Configuration Manager when I want to start SQL Server(SQLEXPRESS):

http://i.stack.imgur.com/MCVm8.png

And here is the event viewer :
http://cld.persiangig.com/preview/PAK0ofEmob/1.png

i download SP2 of SQL Server 2008 R2 but SQL SERVER wont be Update! : 

http://cld.persiangig.com/preview/bmnnO94JUW/3.png

where can I downlaod SQL Server version 10.50.1600.1?!!