Windows Server 2008 Build 6003 !!install!! -

: It introduced "Server Core," a minimal installation without a GUI. This reduced the attack surface and saved resources, a concept that became the standard for modern cloud servers.

Look for CurrentBuild and CurrentBuildNumber . For a fully updated Server 2008 SP2, this will read 6003 . windows server 2008 build 6003

This isn’t a separate service pack. It’s an integral patch. Uninstalling KB4489887 will revert you to Build 6002, but that also removes months of other security fixes. Not recommended unless you have a specific compatibility issue. : It introduced "Server Core," a minimal installation