It's a miracle! The high-pitched sound is gone, thanks for this fix!! I thought I was going to have to live with it while it slowly drove me insane, but I tried changing the USB root hub properties and the sound has stopped, yay!
Here's the desktop on my new Dell 700m! I just found this great forum and couldn't resist posting my screenshot too
Click here for the full-sized version!
What's on my screen:
Visual Style: OpusOS