When you did a Google search for, say, "Windows sounds", the first result that came up would have probably been:
http://www.microsoft.com/windowsxp/using/setup/personalize/sounds.mspx
Come on. You DID try to help yourself first, before asking us to, didn't you?
Once you've done that, look at this: http://tinyurl.com/2297w
Anon, March 2010