Let me give you an analogy: Volvo is known to manufacture very safe cars. Now let's say I drive a Volvo car with a box of dynamite on the passenger seat. I stop at a red light but hit the brake a bit too hard and the box of dynamite falls and causes an explosion, disintegrating everything in a 20-foot radius. So whose fault was it? Volvo?

> Missing a check (or precondition, or validation) is squarely on Microsoft.

Missing a check for presence of dynamite before allowing me to start the car is squarely on Volvo!

You see how silly that sounds?

Now, back to being serious: MS cannot possibly control and validate everything you decide to install and run on your system, specially if the things you install are kernel drivers. It is simply impossible. If you install a kernel driver developed by a 3rd party company, and that driver crashes your system because the devs at that company forgot to perform proper validation of data, well... that's on them. Even if MS wanted, they wouldn't be able to verify the soundness of any piece of code that is installed as a driver and runs with kernel level privileges. That'd require solving the halting problem.