Vista - Exception handling in Vista Application

I'm amased about the poor handling of errors in vista applications in general.
When loading say an mpeg2 file in "windows movie maker" it shuts down
without any reasoning why. Trying an mpeg1 file things seem to work ok, so
thing look to a simple .Net-programmer as I am, like a poor way of handling
exceptions.
When a program loads an unhandled file format I expect a popup of a simple
note stating thus! The unexplained program crash has a nagative impact of a
possibly quite usefull program.
Luckally third party programs, like the programs I write myself, are working
ok.
But it seems that Microsoft own programmers don't obey their own paradigms!??

Simularly the elsewhere mentioned crashes on Excell (and other programs)
exit is amasing! Also here when some Excell program does something unexpected
Excel 2007 shuts down. (which happened recently when loading some game
written using Excell, which is curious possibility I never would have thought
up)

Greetings, as said Vista seems ok when using third party / own software.
Microsoft's own software seems curiously shaky at best!

I hope some future update will provide more stability!