Windows 3.1 sold 3 million copies in the first three months, Windows 95 moved ten million copies in the first year.

Everyone I knew went from either no PC at all, or an older DOS 386-era machine to a Windows 95 computer.

3M copies in 3 months is more than 10M in a year (if you assume sustained sales).

I don't get what the numbers are supposed to imply.

Windows 3.1: ~3 million in first six weeks, ~>3 million in first three months, ~25 million in first year.

Windows 95: ~1 million in first 4 days, ~7 million in first five weeks, ~40 million in first year.

These figures represent Microsoft’s own sales figures.

Still don't support the claim that people were mainly updating from DOS without Windows 3.x. Anecdotally I still think almost everyone using DOS by 1995 had Windows 3.x installed as well. Not necessarily a copy of Windows that was the result of Microsoft selling a copy of course.

Yeah those don't match parent's comment.