Outdated_Garlic Please try the suggestion here:
If that doesn't help, let me know, and I'll ask around for further ideas.
Outdated_Garlic A dxdiag is always appreciated, although in your case it doesn't point to any specific problem that would explain the issues loading your saves. Can you load your main households if you move them to different lots? Please test default lots, nothing downloaded from the Gallery or even that you've built or modified yourself. You don't need to save your progress.
The idea here is to find out whether the problem is the sims or their lot. If you can't load the sims on different lots, try loading the lots in Build mode, then in Live mode (with newly-created sims) if that works. Let me know how it goes.
I tried loading my family into a fresh lot and that also got stuck endlessly loading.
I moved a new family into their home lot and that loaded up fine.
I can also get into build mode on that lot fine. So I guess this would make it an issue with all of my played households over all of my pre-update saves?
