Hello Dick,
I could easily understand this could be annoying to have an application crash.
However, prior to deploy a PB application, ensure to know if the platform is supported for your version of PB.
Windows 8 will be only supported for PB15 (not for PB 10.2.1)
P.S.:
a) I agree that in your case, it works with a PB7 app but as we always say to customers:
"installed PB applications may or may not work on unsupported platforms, but this is your own risk"
b) To better help you on that problem, we need more details about the crash, etc... Do you have any errors in the event viewer (if Win8 has one of coruse) , etc...
Kind regards,
Jacob