This special report marks the 40th anniversary of Microsoft Windows, which launched on November 20, 1985, and traces its four ...

Windows went on sale 40 years ago. Here's the whole history of the operating system, from Windows 1 to 11 and everything in between.

First developed in 1981 by computer scientist Chase Bishop, the software project that would eventually become Windows actually started life under a far wonkier name: "Interface ...