They don’t rely on Microsoft, quite the contrary. The OEM/ISV vendor relationship at Microsoft is the backbone of the company. Linux, servers, phones, infotainment, TV’s, robotics, all run a flavor of Unix (Linux being the primary, but BSD is in there).

For the consumer PC market, Microsoft cornered the market early on with IBM and HP with DOS. They then tried to pull the ladder and raise the gates when they went against OS/2 and Amiga. To win the Windows for Networks wars.

The only reason why majority of consumers use windows is because that’s how they want it. You can easily build a PC, no Microsoft Windows anywhere in a 1 km radius, and install Linux or BSD flavor of choice and be 90% there. Companies don’t want you to do that (i.e. Microsoft and Apple) so they preinstall the OS and it updates over the Internet whenever it wants to. Installing whatever it wants to. User choice be damned.

No, Pc’s don’t need Microsoft anymore than Rap needs p.diddy