Thats the primary reason, that Windows became the predominant PC. My employer at the time, made the processor chips for Macs. We had Mac PCs. They were by far the best PCs. But, they were totally proprietary, and cost a lot. Microsoft, had cheap PCs, and any amateur could order some parts and build one. Apple was a graphical interface and MS had DOS. Early Windows was, to use a technical term, Poo-Poo. Win 3.1 didn't even have a TCP stack. But, windows was basically free. I think MS didn't care, because they got more systems out there. They made their money from corporate licenses, and the general users develop apps that made more people dependent on windows. Even my employer, used more pcs than Macs.
At work, I never used a PC. Went from a Mac, to Sun Workstation. Only used windoze, for games at home. Built my on pcs to be able to play at max.