if you go to start then search and type in backup
it will take you through the process, PERSONALLY i have never bothered on my computers,
obviously a laptop is different as most new laptops you have to create them now,
make sure you save all your important stuff to an external h/d or write them to a dvd,
obviously if you havn't got the drivers/system discs then you also need to save them,
i am pretty confident that you won't have any problems, and if you do it will be a while before your back to ban me
nah just make sure you save photos/docs or anything that if lost you don't think oh s*** i meant to do that