Any idea what could cause this? I shouldn't have anything blocking it, my firewall is off etc..

The only thing(s) I can think of are: either your router is blocking something or some software you have installed is blocking something.
I figured out what blocked it,hamachi did. Thanks so much for ...

Failed sending LAN game broadcast: Sendto (192.168.1.255:34196) failed (61: Connection refused
Factorio crashed.

It looks like it's crashing because the outgoing LAN game broadcast is being blocked by something.

Do you have anything that might be causing that?
Any idea what could cause this? I ...

I've used hamachi in the past and now I stopped, could it possibly be internet privacy settings? Firewall? It says that firewall is off, and the numbers there don't make out my ip.

After a few seconds of me just being in my world immediately after it's been created, it crashes and I can't close the game, nor do anything in general with the game.
I don't use mods, and I've tried several different versions of factorio, I've reinstalled and whatnot but nothing worked ...