Verify you have the latest Vista drivers, particularly video.
Try the FSX experts in the "microsoft.public.simulators" newsgroup
FSX does work with Windows Vista and hopefully someone there can help
you find the solution
--
Jupiter Jones [MVP]
http://www3.telus.net/dandemar http://www.dts-l.org
"Eddie" <edjohnston7@gmail.com> wrote in message
news:1182914763.201603.170070@u2g2000hsc.googlegroups.com...
> So I upgraded to Vista and it sure is pretty. But of course it
> won't
> work with my Flight Sim X. It DID work on XP, but since I have
> upgraded I get this error
>
> The application has failed to start because its side-by-side
> configuration is incorrect. Can someone please help me fix this.
>
> I have unistalled it and reinstalled it. That did not do it.