+1  A: 

Make sure the Exception Assistant is still enabled.

  • GoTo: Tools -> Options -> Debugging
  • Ensure "Enable the Exception Assistant" is checked
JaredPar
Thanks JaredPar, believe it or not I had "Enable the exception assistant" checked.
Sephrial
A: 

Having the same issue, Exception Assistant is enabled. This is very annoying, considering the exception window worked up until about 30 minutes ago...

Let me know if anyone else has a solution to this issue.

Boost2525
A: 

The question #239206 did help me.
Running

"%ProgramFiles(x86)%\Microsoft Visual Studio 9.0\Common7\IDE\devenv.exe" /resetskippkgs

on the Commandline (as Administrator) did the trick for me

Nils
+1  A: 

I noticed this happening when I enable unmanaged code debugging in the project properties.

Dan Berindei
So, I assume disabling unmanaged code debugging then fixes the problem?
Sephrial
It fixed it for me, but since Nils fixed the problem without touching the project properties I'm guessing there are multiple causes for the problem.
Dan Berindei