I just got a new computer and of course it has windows 8 went on and I cant find my library and my ipad was not syncing luckily I have a computer with windows 7 that had iTunes and was able to find my library and get everything done. Was going to get rid of that computer but I guess I wont now since seems the only way I can find what I need on I tunes.
After upgrading my Windows 7 machine to Windows 8, my daughter was able to find her iTunes library. Wonder why you had problems?