Using Visual studio 2010 I got problems when double-clicking, for example a config file (*.config). Visual Studio would open but give me a error message about parameters. If
On Windows Vista and newer Windows Explorer runs with medium integrity level. If you run Visual Studio as administrator (high integrity level) then for security reasons OS will disable drag and drop from Explorer to Visual Studio.
You can either run Visual Studio as normal user or you can install VSCommands for Visual Studio 2012 extension. It has several features that can help with this such as: