When I open my SLN file in Visual Studio, it launches and loads correctly with no errors. When I select a VB file from the Solution Explorer, I get the following message:

I have tried to associate the file type with Windows, but it is already associated. What can I do to get my files to open? HELP PLEASE!
EDIT
: I can right click and open any file in Visual Basic Express and it works, but the problem is that when I am in the IDE I cannot open files from the solution explorer which means I cannot edit the UI.
The problem described was occurring due to a bug in the Windows 8 developer preview. Upgrading to the Consumer Edition fixes the problem, and adds a number of stability improvements, plus a new Visual Studio IDE is available: Visual Studio 11.