My last two attempts up AdZ have abruptly ended after turn 8, due to memory exhaustion causing Windows to kill Zwift and everything else. This happened in February during a small meetup and again yesterday during ToW.
I haven’t had this issue in other rides or routes that take more than an hour and I have been able to complete AdZ before, so maybe there’s a regression in a recent update?
I did my usual four Alp repeats on my Win10 machine yesterday without problems and also a double alp the day before.
I get that this doesn’t help you that much, but at least it indicates that it’s not a general Win10/Alp issue.
To my knowledge, this has to do with a low virtual memory condition and can typically be corrected by increasing the page file. Maybe check out this article and see if that helps.