Windows Longhorn build 4048

Windows Longhorn build 4048 is a Milestone 7 build of Windows Longhorn. On 23 January 2020, this build was listed on a thread by UX.Unleaked blog founder Grabberslasher to be released to the BetaArchive FTP, and was released in the third set of his 33 Longhorn/Vista builds on 26 January 2020, alongside multiple compiles of build 5000 and build 5001. This build's  is missing some of its files due to corruption, making this build uninstallable and leads to Blue Screen of Death. However, a user on the BetaWiki Discord server by the name of lucasm had successfully installed this build on a hypervisor.

Setup
It is unknown whether this build includes the redesigned setup as seen in build 4050 due to the setup media being corrupted from install.wim onwards, making files containing setup assets unrecoverable.