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 my solution was:

• Download Multi-Targeting Pack for Microsoft .NET Framework 4.0.3 from https://www.microsoft.com/en-us/download/confirmation.aspx?id=29052
• Install

The problem was solved immediately (error message went away).