I am at wits end on this one...

Windows 7 Home Premium... installed my SB7 installed app... works fine for awhile... then one day when you try to run it... you see the circle spin briefly and it doesn't open. But there is no error message.

It worked previously on the computer just fine. I have found 3 cases of this and another one from a customer today.

My only thought is that a Microsoft update has changed something on the computer but I don't know for sure. I personally have a laptop with the same 64-bit Windows 7 Home Premium and cannot reproduce the problem... the app runs fine.

I am at a loss as how to debug or fix this.

I have added the app to the DEP exclusion list and also turned off UAC just to make sure those were not the problem. That did not fix the issue.

Any ideas or help appreciated.