Windows Server 2008 build 3790.1232

Windows Server 2008 build 3790 (with a build tag of 3790.1232.winmain.040819-1629) is the first "Longhorn" build compiled after the development reset. It is the first build to be compiled in the newly named winmain branch. It is a server counterpart of Windows Vista build 3790.1232. This build was leaked by Grabberslasher as the second set of 33 other Longhorn builds on 2020-01-25. Unlike other post-reset builds, this build does not use  and thus can still boot without ACPI.

Microsoft had numerous problems with the earlier Longhorn builds, including stability issues, memory leaks, and so on, and because of this, they decided to replace the current version of the underlying Windows Server 2003 codebase with a later version (Windows Server 2003 Service Pack 1, rather than Windows .NET Server 2003 Release Candidate).

Zero-day activation
The build must be activated before log-on. Most versions online have a way to remove this activation method, although the copy on BetaArchive's FTP has these methods removed.