
If you buy a PC it has Windows on it. The majority of people are not cocking about formatting a USB stick and fiddling with the BIOS to put Linux on it. They aren't thinking about operating systems at all, and if you need specific software for work, chances are it isn't going to run on anything other than Windows. If you don't need it for work, you've probably just got a tablet by now and store all your photos on Facebook.