You don't need to know anything about Ubuntu to use it.

If you can burn an image to a cd or usb-stick and boot your windows computer from cd or usb, then you could follow the linux flasher instructions. Nothing about your computer needs to change (except maybe setting boot order in bios).

When you quit and remove the "live cd" (or live usb) (as it's called when you can run an os from a cd) and reboot, your computer will boot into windows again as if nothing happened. With a live cd your hdd(s) don't need to be used at all.