A customer of mine has a Dell laptop that has a failed motherboard but a perfectly healthy, intact C: drive. (All of their programs and data is on the drive the way they want it) They are buying the exact same computer model and want me to simply swap hard drives. I know that OEM Windows is tied to the motherboard. My question will it have to be re-authorized? I've read that you can usually change about 5 pieces of internal hardware before triggering the necessity to activate; But is it serial numbers of parts or model numbers of parts that triggers this? Again I'm moving the hard drive to a duplicate Dell model number. Will the manufacturer allow a swapping of licenses if you call them? Anyone have any experience with this? I want to avoid doing a "repair install" (to match to OEM license to the computer) if possible.