Disable the iTunes import finished sound
I found the answer here, and it worked for me on Windows 10.  Instructions copied just in case the website goes away:


Click Start then Control Panel
Type sound into the search box at the top of the Control Panel and press Enter
Click the Sound link from the Control Panel. The Sound properties window launches
Click the Sounds tab
Scroll down the list of available sounds in the iTunes section. There are two sounds associated with iTunes: Complete and Page Load Complete
Click the iTunes sound that you want to turn off
Select None from the drop-down box under Sounds. Click Apply
Repeat Steps 6 and 7 for each iTunes sound that you want to turn off