brad in aus

1st problem: In Vista RC1, when I go into the music library, the screen goes
black and a message appears, saying that it is searching for the problem,
then a few minutes later it restarts and this happens over again and again.

2nd problem: In WMP11 the video playback is very laggy but not in Windows
Media Center.

3rd problem: I set up some quadraphonic speakers and the back two won't work
in WMP. I think it may have something to do with the sound effect manager,
which I got when I had XP.

Does anyone have any solutions to my problems or a solution for a sound
effect manager upgrade or some such.