ipod touch will not sync after new itunes update

Try resotring it from a backup if you have one (or just restore it if you don't) since it sounds like your computer DOES recognize that it is plugged in.

Restoring erases the iPod. You can redownload iTunes purchases by:

Downloading past purchases from the App Store, iBookstore, and iTunes Store

You are welcome.

What exactly happened when you restored the iPod? Error message?

Same as lllaass, it should have given you an error message.

You may want to try this article.

I'd say to try restoring to Andrea' ipod, since it sounds like it was backing up to your computer.

If you restore to that and it still has issues, then you'll need to set it up as a new ipod.

No, leave tour music in iTunes. Otherwise, you'll lose all your music (unless you purchased it all from iTunes, in which case, you'll have to redownload it all.)

By any chance, does it tell you that your account is not authorized for that computer or something similar?

It would mean that all of your music was stored in a folder somewher, but then that folder disappeared, so iTunes doesn't know where the music is now.

If you moved some folders around on your computer recently, then it means that you probably placed the music somewhere else. iTunes just keeps track of where the files are on your computer, unless you tell it to copy all files into its library as you add them (which it appears you didn't).