A major reason that Windows is “popular” is because it’s pre-installed on desktops and laptops
I think thats being a bit disingenuous
its also that Windows has always been easy to use because it has an good GUI thats easy to navigate and figure things out with. You can sit anyone in front of a windows machine and they can figure out how to use it and what to do in relatively short order without spending half the time in internet searches or trying to decipher esoteric terminal commands. Its easily one of the best point/click/discover UIs as far as OS’s go.
And its understandable that it easy, considering they’ve probably poured billions of dollars into making the GUI easy to understand and use for any layperson since windows 95 began development and the move away from dos command line.
Sadly their GUI started to decline with Windows 10, and I have not touched 11 with a 10 foot pole, so I dont know how good/bad it is…but I wouldnt be surprised if its worse than 10.