Itunes unexpectedly quits

Ok, so I bought an iPod Shuffle last friday amd it was perfect. Until 4 hours later that i first plugged it in my computer, and it all went fantastic until I coicked the button Voice over on. Sorry if I have the command's name wrong but I have the spanish version and I translate it's meaning literally. Anyway, All was right, i had accepted the contact and everything, and then, when the upper part of itunes was saying "downloading voiceover kit" part 1 of 3, and suddenly, itunes stopped funcioning. Then wondows showed me a message saying 'itunes stopped working' and then, the program closes. I have had this problem sinde that day, and i'm really nervous. Please, tell me what to do.

Aditional Details

I have a 4th generation iPod shuffle, iTunes 10.6.1, and a dell computer with windows home premium pack. Just in case you doubted whidh things I used.