Hello, I had the idea to install ubuntu linux. I just wanted to know how to back-up windows (i know i can install ubuntu on windows). I dont remember where I put my back-up CD can I back it up in my external hard-disk? is it possible to use the hard disk to install ubunto and still have the windows back-up? because last time i installed linux it took over the system restoring from windows. or what should I otherwise do?