Smart Computer PPL please READ -reformat help

[boohaa12]

Hey i know i dont post in OTT much, but please help me out guys, i know youre all smart. Im have a 2ghz HP a220n computer and its been takn me longer and longer to restart and do things (at about 4 minutes now). The computer is just getting old. I have never reformated but now is this time to get another year out of this thing. Iv backedup all my important documents/databases. I am runnning Windows XP sp2. I have no, or can not find anywhere, my reformat disks? Is there anyway to reformat this thing to factory state??? please help. Thank you in advance.