Windows Longhorn build 4033 (idx01)

Windows Longhorn build 4033 (idx01) is a Milestone 6 build of Windows Longhorn. On 2020-01-23, this build was listed on a thread by UX.Unleaked blog founder Grabberslasher to be released to the BetaArchive FTP, and was later released in the sixth set of his 33 Longhorn/Vista builds on 2020-01-29, alongside Windows Vista build 5487. This build is only available in the IA-64 architecture.