A key generated for will not work on an SP4 disc. The algorithm changed slightly with service packs.
Here is a little-known fact: A valid Windows 2000 Professional key from SP1, SP2, or SP3 work with an SP4 installation if you perform a clean install. However, during the setup, if the key is rejected, you can install using a generic SP4 key (for installation only) and then immediately activate it with your legitimate license after the OS boots. This is legal as long as you own a license. product key windows 2000 professional sp4
It is important to distinguish between the different types of keys: A key generated for will not work on an SP4 disc
Used by businesses for multiple machines; these keys often bypass the standard activation requirements found in later versions like Windows XP. Locating Your Product Key However, during the setup, if the key is
Pre-installed on computers from manufacturers like Dell or HP; keys are tied to that specific hardware.
Unlike modern Windows, Windows 2000 Professional did not require internet activation for most volume licenses. However, retail versions used a phone/online system that is now .