How do I target .NET 4.0.3 on XP using Visual Studio 2012? Application fails to run with “not a valid Win32 application”

Question

I have a large application targeting .NET 4.0.3 that needs to run on XP. It builds fine using Visual Studio 2010 SP1 and runs properly on XP.

Building using Visual S

Answer 1

Microsoft just recently posted a fix for this. (Express versions included.)

Details at: http://blogs.msdn.com/b/smondal/archive/2012/10/15/setup-exe-is-not-a-valid-win32-application.aspx