90′s was a decade of MS Windows. Microsoft was a gigant company. Everyone no matter what was running Windows OS.
Pirated or legal it was installed on over 90% of all Computers in the world. There was a small minority of users running other OSs. Macintosh, OS2 and other systems for tech savvy people never made to the broad market. 10% market share was a great achivement.
And than KDE and GNOMe, New G3 series of Macs poped out. Linux SuSE, Debian, Mandrake and other systems, Microsoft started to loose its grip on the market. Now with Google announcing their new OS Microsoft should be worried!