Annoyingly not all laptops come with a backup so usually the onus is on you to make your own hence this thread
My method is having 2 partitions C drive and D drive, and I use the D drive to store the backup of C using "Acronis", once installed run the program that creates a bootable CD, once you boot up the disk Acronis will now start and thats were you select C drive to be backed up and saved to your D drive, you can either pay for this software or torrent it, choice is yours!
regarding having a copy of windows on a disk, either buy if from a shop so you have an original disk or torrent it
so its that old chestnut "torrent or pay"
hope that helps