Windows that come preinstalled from a hardware vendor have OEM lisc. If you buy windows that isn't OEM the keys are now bound to your email address (more accur

Windows that come preinstalled from a hardware vendor have OEM lisc. If you buy windows that isn't OEM the keys are now bound to your email address (more accurately your Microsoft account) those version of windows are easily transportable between hardware. People often make the mistake of purchasing OEM windows because of the reduced cost but fail to realize they are hardware bound at registration.