JoAn - computer illiterate.

Please help. It's very urgent!

I purchased a laptop approx 3 months ago and just realised that I was never
given a windows vista installation CD. However, Windows Vista home premium is
already installed into my labtop. It has the genuine windows vista sticker
stuck on it, with other stickers eg core2duo-intel-centrino and etc.

Can someone PLEASE teach me how to make a windows vista rebootable CD/DVD?

I have my 25 digits code on my laptop too. Is there a way to make a backup
copy or the installation of windows vista CD?

THANK YOU SOOOO MUCH FOR YOUR HELP. I'm worried that my laptop might crash
on me one day.