Me and my brother had this problem it turned out he installed 32 bit vs. And I had 64 bit so I told him to get the 64 bit vs. And it worked fine many hours killing buyers after that (we both have 64 bit os he just didn't read)

So me and my brother were playing and had the same problem and were about to give up till i asked if he downloaded the 32bit version by accident and he did so he uninstalled and downloaded 64bit and it worked (both of us use 64bit windows) short and simple 64bit factorio dosent work with 32bit facto...