If anything, Microsoft has a lot of problems because they support a wide variety of crappy hardware and allow just about anyone to write kernel level sw (drivers). Not sure if this changed, but they used to run in the ring0 even.

This was most evident back in the 90s when they shipped NT4: extremely stable as opposed to Win95 which introduced the infamous BSOD. But it supported everything, and NT4 had HW support on par with Linux (i.e. almost nothing from the cheap vendors).