Hi I'm a computer noobie and i wanna reformat my comp to start over from scratch. I think i can do it if i follow instructions on websites, but I don't have a windows Xp disc, but i do have a windows 2000 proffessional disc. Can I reformat (reboot) a comp with WIndows XP to Windows 2000 using the windows 2000 disc. Also what is considered a bootable disc? The CD i have is the WIndows 2000 Upgrade CD, not a restore CD. I've never reformatted before, so any tips, or instructions would be very helpful.