I think that a random spammy site is not going to afford burning such a zero-day. There is much lower-hanging fruit for them, and your system does not look lik

I think that a random spammy site is not going to afford burning such a zero-day. There is much lower-hanging fruit for them, and your system does not look like their target "difficulty level". That said with a level of paranoia like yours (that I'm not critiquing) I'm not really sure Windows is the best choice first of all.