In its consumer operating systems, MS used to not consider it a bug for a process to exploit other processes on the same machine. After all, why would you be ru

In its consumer operating systems, MS used to not consider it a bug for a process to exploit other processes on the same machine. After all, why would you be running untrusted code? I'd also add that Microsoft used to be notoriously bad at security, such that even Mac owners would make fun of them. We're still dealing with the design decisions made during that era. It's only since XP SP1 that security was taken more seriously and it wasn't until Vista that they truly started to grapple with the whole mess from the ground up.