hey guys, my pc is a bit slow so im deciding to reformat my pc to make it faster. the problem is that i dun even noe how to reformat and i got the emachines pc from bestbuy. it came with cds so i guess it should contain the windows xp OS. i got 2 external hardrives (my 20 gig ipod and a portable 40 gig hardrive) for back ups.