im somewhat new to the computer and would like to know how to backup my files so i can do a system restore?

Derni�rement mon ordinateur ex�cutant a �t� lente et i i si on a dit qu'il voulait courir vite encore i n�cessaires � la sauvegarde de mes fichiers et � r�tablir un syst�me informatique, mais en ne l'avons jamais fait auparavant. I bought the disc and have a dvd / cd and dvd / cd / rw drive how I do this so I can restore the system. I want to keep similar files on the same disk (such as games or points printing etc. ..) the operation of some discs that I came with the computer, what should I do with the software provided with the computer, but he was maintained by the Internet and the disc is not the last version.thanks