Ulead video studio 10 messed up my DV video playback?

It seemed like after I installed the Ulead VideoStudio 10 with Vista update and Service Pack 1, I got problem playing DV video on Windows Media Player in my Vista system. Interestingly, the problem seemed to go away after I uninstalled the application. Plus, the application wasn't compatible with the Vista Graphic engine, and force the system to get into basic color scheme.

The problem is that I still need to find a way to do non-destructuve DV video trimming. So tonight I'll probably give VideoStudio version 11 a try.