MY IPOD WONT CONNECT TO ITUNES

I have a old Ipod 3rd Generation Classic 20Gig (with dock connector) and it is stuck on the apple logo screen. It never moves I have tried to reset it but it just goes back to the apple logo. When I connect it to my PC (Windows Vista) it says there is a "USB Malfunction". And when I check the drivers in control panel the ipod is recognized as a "unknown device" when I check the properties it says it has not drivers. Lots of forums say to reinstall apple software which I did. This ipod also is not detected by iTunes. I have tried everything. And yes I reset the ipod, restarted my computer many times and downloaded new apple software. I know I sound poor using a 3rd Generation Classic, but I just felt like using it. I have a Iphone, mac and a Ipod nano the new one and the 4th gen. I'm planning to sell this to a possible buyer, but first I have to fix it. And obviously it is out of warranty. I called apple they said take it to the apple store. I will try that but that is my last resort. PLEASE HELP!