I have Visual Studio 2010 /SP1 / MVC 3 (With April Tools Update) installed on a machine with a fresh install of Windows 7 64-bit Professional.
I do not have resharp
Please note that for me what caused the problem was the Roslyn Language Services plugin installed. When I uninstalled the plugin the issue was solved. To uninstall the plugin simply go to tools->extension manager and find the plugin Roslyn Language Services. Click the uninstall button and restart VS2010.