Well there are some free third party software solutions which will transfer/backup your media from your iPad to your PC, if you google it you should find it......there are also some threads on the forums here regarding the exact same issue, you may want to have a look at them before you download any additional software......our search function will help you find them.
I know it's locking the stable door after the horse has bolted......but ext HD's are dirt cheap, I would suggest getting one and making a bootable clone of your PC so that if the worst ever happens again you will be good to go instantly.
The Archangel
