Hi, I just tried this again, w/this game the only thing running and my video card drivers completely updated and it still freezes up. This is w/a single sim in a very small 1 room house w/very few things. So, I'm thinking that this must be their programming. At least in part.
Oh yes, and my specs are: win 7/64 bit, 24 gig RAM, Intel i-7, 3.20 gig processor, Page file: 6240 megs used of which currently (w/sims the only program running) there is 42891 megs available. Video: GeForce GTX 970 w/4 gig RAM. So as you can see, it's MORE than enough to run the sims smoothly.