Game Crashing after 5 minutes of gameplay (real time) - screen frozen, clock stopped, sims frozen...

I'm happy to take a look, but NRaas script logs are usually best to be uploaded to us at NRaas.

I know you are just getting to it, but not understanding this apparent reluctance to running a clean folder test. The point here is to find a place where the game does work properly, if such a point exists, and take it from there. Game folders are designed to be totally swappable.