Windows Server 2003 build 3790.1421

Windows Server 2003 build 3790.1421 is a Service Pack 1 beta build of Windows Server 2003, the x86 architecture version of which was supposedly uploaded to the aforementioned website on 28 October 2021, This build is currently available only in the x64 architecture.

Changes

 * It includes the Windows Server Post-Setup Security Updates on first boot that closes incoming connections to the server when the window is open to allow server updating.