I have just installed Visual Studio 2010 Beta 2 and it crashes when I try to open a file - also when opening any cpp file through the 'File' menu.
Any ideas? Where is the appropriate forum to ask about this?
Visual Assist was the culprit - disabled it and now it works fine...
The official forum is here: Visual Studio 2010 & .NET Framework 4 Beta 2 Forums. You should ask there for better support, perhaps in the Visual Studio 2010 Install and Setup forum.
Try to run as administrator the visual studio 2010. Your problem will be resolved.