Habit. I meant on Windows. It hasn't done it since I made the post, but it has done it at least 5 times in the past. There are pieces of software that I have to prevent from auto-updating because otherwise my render farm doesn't match my local machine, and this is easiest done through just blocking it from external networks. Everytime this resets, I have to re-install everything. It is very frustrating, and I am clueless as to why it happens.
BTW the verification images are ridiculously small and hard to read on high DPI screens... suggest a change to that.