I am only using Windows defender, and malwarebytes, have run a scan with both earlier today

It could look that way as I installed Factorio for the first time on this machine a couple of weeks back? I'll upload my new factorio-current.log as the previous is now the original factorio-previous.log

I'll add that since my original post, the game has crashed twice for me again.

Had the game crash on me 3 times within 45 mins whilst playing my Lazy Bastard achievement map. Giving the same error each time.