Hi mom-of-teen,
If changing the iPod's drive letter doesn't help, then you could try reformatting your iPod in Windows, followed by a restore:
1 - Connect your iPod to your computer.
2 - When iTunes has finished syncing with your iPod, open "My Computer".
3 - Right-click on your iPod, and click on "Format". (If your iPod is not showing in My Computer, make sure that
disk use isn’t enabled in iTunes).
4 - Here, verify that your formatting settings are "Default", with the format type set for FAT32. Also, make sure that "Quick Scan" is not selected.
5 - Then, click on "OK" to begin the formatting process.
6 - When this is complete (it might take a while), make sure to restore your iPod in iTunes again, so as to properly reload the firmware back onto it again.
-Kylene