Windows Xp Professional 64 [upd] -

It was not a successor to Windows XP Professional (32-bit), but rather a specialized offshoot aimed at technical workstations, power users, and early adopters of 64-bit computing.

For many users, Windows XP Professional 64 represented the perfect blend of stability, performance, and compatibility. Its core strengths included: windows xp professional 64

The familiar rolling hills of the 'Bliss' wallpaper appeared. It was the same green idyll that graced millions of office cubicles around the world, but to Elias, it looked sharper. Crisper. It was a landscape built for a wider world. It was not a successor to Windows XP