After installed Windows 10 on my PC, I have not been able to download any new music to my ipod

Hey there lesher344,

Thanks for reaching out to Apple Support Communities. I understand you’re having issues syncing your iPod with iTunes on your computer and found an error related to the driver. I’ll be happy to help.

Just to verify, when you connect your iPod to your computer, do you see any errors in iTunes or does your iPod not show up in iTunes at all? If so, the following steps may help:

• Check that you have the latest software on your Windows PC. 
• Make sure you have the latest version of iTunes.
• Unplug all USB accessories from your computer except for your device. Try each USB port to see if one works. Then try a different Apple USB cable.
• Restart your computer. 
• Restart your iPod touch

If that doesn’t resolve the issue, follow the steps under ‘If you use a Windows PC’ from this link to update the driver:

If your computer doesn't recognize your iPhone, iPad, or iPod

If the issue continues after that, remove iTunes and it’s components in the exact order from this article, then reinstall:

Remove and reinstall iTunes and related software components for Windows 7 and later

Regards.