At some point if they have ridiculous restrictions one might consider ... doing the test in person, in a room provided by the actual school or that THEY provide the hardware.

Anyway IMHO the bigger point is that a lot of my own inaction (I won't speak for others) came from fear of problems that rarely, if ever, materialized. I would recommend to move on and if the problem does actually arise then consider solutions at that point.

I uninstalled Windows on my SSD years ago (despite paying for it, forced by OEM deals), didn't regret it once. In fact, I wear it as a "badge of honor" with pride. When someone tells me I "have" to use Windows for whatever reason, I tell them I can't and that usually leads to interesting conversations.