[downrange]

As the responder already said, you'd have to erase things by hand because you can't replace windows w/o the discs. But no matter who you're giving it to I don't think that's a good idea; for one thing you don't know if/where windows has been saving any of the login names/passwords you use for whatever. And even if you knew no sensitive personal info was stored in any remaining windows areas you also can't thoroughly erase all the non-windows stuff just by doing "delete".

Don't mean to sound paranoid but since you don't know where this computer/hard drive will go after you give it away I would get a tool from seagate or western digital or some freeware thing that will rewrite every square inch of the hard drives to completely obliterate EVERYTHING. This means the computer is useless to whoever you give it to until they install an operating system.