Itunes won't find my devices?

For some reason my devices (iPod, iPad, and iPhone) won't register in iTunes. I've tried uninstalling and reinstalling, changing usb ports and resetting the lock down folder. I will get the Allow dialogue but not the Trust This Computer dialogue.
My computer knows that the device is connected, and iTunes opens up, but then says that the device "could not be identified properly." This then autodisconnects my iPod from the computer.
I'm starting to get really frustrated and none of the Apple help or other help people posted have worked. If you have any ideas please let me know!
-Any other you might need I can provide as well, but all of my devices and programs say they are up to date!

Read more: Itunes won't find my devices?