The game crashes to the desktop without errors.

@Jaydee2906  Your save is using a lot of memory but not so much that that's definitely the reason it crashed.  For the sims floating when sleeping, please evict the household, save the house itself to the bin, bulldoze the lot, place a copy of the house, and put your sims back.  If you do this in one Edit Town session, without saving and replacing the sims themselves, they'll keep their jobs and relationships but lose their promised wishes and opportunities.  If you don't like that result, there are workarounds, but please test this first; it's easy enough to quit without saving.

I still need a few things from you though:

• a dxdiag
• the values you see when you use the fps on cheat
• the optimization guide you followed