iTunes broken, uninstall doesn't work

Hi all,

After happily using my latest gen. 80GB iPod with iTunes, one sad day it stopped working. My library was gone everytime i closed iTunes, and re-importing an old library didn't work.

So, I figured I'd just re-install iTunes, I go to add/remove program, click on remove/uninstall iTunes, and here's what I get: iTunes.msi file cannot be located. I've tried searching for this file, but there isn't one on my entire comp.

SO, it seems without this file i cannot uninstall iTUnes, as a result not install it again - and as overall result, my iPod has just been stranded without any way to talk to my computer.

Any suggestion appreciated.

Thank you!!
Lisi.