Sure. First, where did you get your computer from? Depending on where you got your computer from, you will need to do different things. First, make sure there isn't anything you need to keep on your HD. To begin, try this: put your CD-ROM that came with your computer into the drive, then restart the computer. If your computer boots from the CD, then you're good to go. All you have to do is follow the on-screen directions. This, of course, won't work if you just have a normal Win XP disk. You should have some kind of disk that says "Toshiba Recovery Disk", or something of the like. Post back with where you got your computer from and wether or not you have a special disk.