okay so had this exact issue last week and i managed to fix it so i'll see if i can help.
pretty much, you have to install service pack 2, go to google and type in 'windows service pack 2' and find one of the links that takes you to the download page
once you've done this you have to unintstall your itunes. if you search it in itunes help it gives you instructions on how to do that. from there you have to install the newest version of itunes from apple. You should probably restart you're computer to make sure everything is downloaded properly and is working. from there i just plugged the thing in and it worked!
i hope this helps.