What's turned out to be most frustrating for me is the fact that I can't easily find a log of what's happening.Is it the device connected/disconnected bing bong?
Are you using a sound card or on-board-mobo sound?
Have you tried a different sound profile?
You could try a Windows refresh - although I'd personally dread doing that.
I'm wondering if you have a dodgy USB socket.
Is there a way you can record the sound and post it up somewhere so we can hear it?
Trouble is with these things is the irritation could be almost anywhere... wishing you luck!
Last time I had any in depth knowledge of OS etc was Win95b. Packed in all the PC stuff in 98 when I realised I was spending more time fettling the PC than actually using it.