I "upgraded" to Windows 2000 and now Winamp will not play. I get an error message telling me waveOut plugin v2.3 is in used by another device, which it is not. I have uninstalled Winamp and re-installed and get the same error. Any suggestions?

Prefs -> Output -> WaveOut -> config:
Change "Output Device" from WaveMapper to one that best describes your soundcard.

If the problem persists:
Change to DirectSound plugin (Prefs -> Output)

More info (from TSGH):
RE: MMSYSTEM004 Error (Device already in use)
http://forums.winamp.com/showthread.php?threadid=35637
http://forums.winamp.com/showthread.php?threadid=26288
http://forums.winamp.com/showthread.php?threadid=32707
http://forums.winamp.com/showthread.php?threadid=31953
http://forums.winamp.com/showthread.php?threadid=31545
http://forums.winamp.com/showthread.php?threadid=25764
http://forums.winamp.com/showthread.php?threadid=31957
http://forums.winamp.com/showthread.php?threadid=19337

btw, did you also reinstall Winamp after upgrading to Win2k ?

figured it out. When windows 2000 loaded, it killed some of the drivers. Had to re-installed the drivers, re-installed Winamp and all works fine. Windows 2000 isn't as friendly as you would expect.

I would be so surprised I would crap myself if I ever found an M$ product that actually is friendly.