Had the same problem. Fixed it!
by quinnep-21598527118367186791228139639782 - 2/7/07 6:33 AM
In Reply to: Found New Hardware (MTP Device) wont quit popin up! by dcmarter
So mine has been blinking at my all morning and making this really obnoxious bleeping noise.
Go to Control Panel > Taskbar & Start Menu.
Then on the Taskbar menu hit "Customize" That will show you the current items in your taskbar. You should have one that says "<no title>" - that is the MTP Device. Click on the "Hide when inactive" and change it to "Always hide".
This should have no affect on you being able to put music on your device. Hope this helps, and good luck with everything!