What is the command for clearing a dell desktop?

I am giving my computer away and i would like to clear off my computer, ive done it before on this computer but i cant remember the code you have to press to get to the patrician and have it wipe my computer, so if anyone knows the button sequence that would be helpful, it is a dell dimension 2400 with xp, its quite oldWhat is the command for clearing a dell desktop?On most Dells up to about 2007, while you see the Dell logo you merely hold down CTRL and start tapping F11 until the RESTORE COMPUTER screen shows up. Note that this is a fully-destructive restore that sets the system back to the way it was when it was first unboxed. Any unsaved data will be lost. If you need to recover data first, I suggest try booting in Safe Mode With Networking (in the event you might need internet or network access once booted) by tapping F8 at the Dell logo screen.