Windows Longhorn

"Longhorn" was the planned successor of Windows XP. This project never released, but rather its development was reset, being the new project Longhorn/Omega-13. The earliest builds after the reset were known as "Codename Longhorn", causing some confusion.

Builds
Confirmed, Unconfirmed , Fake

Milestone 3
(The timestamps and build string is not known exactly for these last two builds).

Development Reset
See Windows Vista