Windows Longhorn 4074 R2 -idx02- 64 Bit -

Released during the Windows Hardware Engineering Conference (WinHEC) in May 2004, Build 4074 was the last major public demonstration of the "original" vision for Longhorn. Shortly after its release, Microsoft famously "reset" development due to stability issues, scrapping many of the experimental features showcased in this build to start over with a Server 2003-based core.

was present, designed to hold "gadgets" for real-time information. WinFS (Windows Future Storage): Windows Longhorn 4074 R2 -idx02- 64 bit