I had a problem with Visual Studio after a service pack update. I was unable to create a C++ project. The project dialog would just disappear and then come right back. I'm not sure if the SP1 update caused the issue, if it was a combination of SP1 and a custom installation directory of Visual Studio, or something entirely unrelated. I searched for a fix all over the internet and came up blank. I decided to try uninstalling and reinstalling Visual Studio. However, once the uninstaller opened I decided to give the repair a try. After repairing the installation and rebooting, I can now create C++ projects again. So if you are having a similar problem, give that a shot. It worked for me. Sometimes it's a simple fix.