If it's compaq and it's only a couple of years old it's an HP. If it's a laptop when you open the lid it should have the make and model number up by the hinge. If not it should have a service tag number or serial number on the bottom and you/us can look it up from that. If it's a desktop there should also be a label somewhere on it that gives you those coupla of numbers also. If you can see it's a compaq there should be some numbers next to that as well and that's usually the model number.