Visual Studio 2010 error: “Project Target Framework Not Installed” when opening a .NET 4.0 project

Question

I am experiencing a rather disconcerting issue with one of my development machines that I hope someone can advise me on.

I have a large Visual Studio 2010 VB solutio

Answer 1

I had the same problem and tried the work around listed here.

I went to properties and chose the framework 3.5 and the errors went away. I do have the problem that although the 4.0 problem is installed on my computer, Visual Studio can't find it, but I am not using any 4.0 specific functionality, so this works for now. If I figure out why the 4.0 framework is not detectable, I'll update this post with the fix for it, too.

Edit:

I don't know WHY there was a problem, but after reviewing the help at this forum. I used this utility to fully uninstall VS2010 and .NET Framework 4.0.

I then fully reinstalled, AND I installed the Visual Studio 2010 Service Pack 1, and everything works!

I hope that helps someone.