No, the reason Windows dominates the corporate world still today is the A PPLIOCATIONS and NOT the OS itself. It started with MS-DOS-applications that gradually were replaced with Windows-applications in a very soft and fuzzy transition in the beginning of the nineteenninetees. Under Windows almost all MS-DoS applications could coexist side by side with Windows-applications at least since version 2,21 that I have personal experience of. Version 1.0 or 1.03 that was the first version I have seen was more limited. Windows was a perfectly natural but technicalluy"uglu" extension of MS-DOS.
Microsoft’s DOS lineage began with 86-DOS, created by Seattle Computer Products in 1980. Microsoft acquired the rights in July 1981, refined it, and provided it to IBM as PC-DOS 1.0, released together with the IBM PC on August 12, 1981. When Microsoft started offering its own version to other PC makers, it adopted the name MS-DOS, with the first broadly distributed release being MS-DOS 1.25 in 1982. That unassuming command line became the technological bedrock for the PC era. That is the beginning of Microsoft a a “platform”-company. What secure Microsofts success wasa that every PC was bundled with MS-DOS. That was a monopoly already from start.
A few years later, Microsoft introduced its graphical future: Windows 1.0, released on November 20, 1985. It wasn’t a full operating system, more a graphical shell resting on top of MS-DOS. Windows 1.0 didn’t allow overlapping windows, giving it a tiled, experimental feel, but it provided the conceptual jump that shaped everything that followed—Windows 2.x, the breakthrough with Windows 3.0 in 1990, and eventually the sprawling Windows ecosystem we recognize today.
These two releases—MS-DOS in the early 1980s and Windows in 1985—form the twin origins of the modern PC landscape, small steps that became an entire digital world.
So the origin of this dominans is in fact 20 years older than what happened in the beginning of the twenties.
What might have started the “PC” desktop revolution was the birth of the “spreadsheet-revolution” with the “Visicalc”-application 1979. It was made initially for Apple II and not MS-DOS and IBM PC. Among others especially corporate accountants had grown increasingly tired of the dependancde of IBM Mainframe IT-staff in their white robes to get data for business analyzes and longed for a more free solution and exactly that was Visicalc promising. But already after a couple of years Visicalc was marginalized by MS-DOS alternatives.
The original Apple Macintosh — the very first version — was released on January 24, 1984.
The glory days of Apple II and Visicalc were short. The later totally dominant PC spread sheet app Lotus 1-2-3 arrived in the world in January 1983. It landed on the IBM PC like a meteor and instantly became the machine’s “killer app,” the thing that made businesses say: we need one of those beige boxes, now.
If you’re tracing the evolution of productivity software, this release sits right next to VisiCalc (1979) and precedes the great migration into the land of Windows and Excel in the 1990s—each step a little monument to human impatience with arithmetic. Excel was the first killer app for Windows.