I have the same problem, only a different scenario.
I have had Win2000 on my machine since new, a couple of
years now. I recently installed a Chiefs (NFL) theme and
I believe that it was created on Win98 or such. The date
on the theme is 99. I have no other themes on my machine.
Although the theme sounds play properly, everything else
is too fast. It doesn't matter if its a power point
presentation, Flash, .wav or streaming audio. It all
sounds like Alvin and the Chipmunks (dating myself here).
Where is the fix? Ideas?