Lot of drives from AD Intellex DVMS 16 or 32 Channel DVR ADD60032 (Sensormatic) 3 Maxtor DiamondMax 160gb drives- Had not had a lot of use, had an error come up that it was "missing or corrupt file" when starting boot up of Windows 2000 Professional, and then windows would not boot up, so no guarantees on anything. (we have the mainboard in a separate listing) One or more drives also would have the Intellex DVR program on it but no way to validate if it will be of any use without Windows booting up. SELLING AS IS! Also tossing in 1) WD400BB came from another unit but "NO OS" was hand written on that so it may have been wiped as there is a sticker on it that appears to imply that. We are including the embedded license key codes with them that were on the computer chasis, but no guarantees other than the drives are guaranteed not dead/fried in which case we would refund 1/4 of the item price in the rare event you get a dead one. No guarantee on any software or o.s. on them Buyer to have proper knowledge.