Sims 3 crashes on save. How do I fix it?

I wanna start by saying that if it can't be fixed with duct tape, then I probably don't know how to fix it. Please give me your answer in the simplest terms your super programming brains can muster.
With that said...
The Problem:
Whenever I try to save my Sims 3 game, (Sims 3 with Ambitions expansion) it crashes, and the save does not take place. With a game like the Sims, there really is no point in playing if you cannot save. The problem first arose on Tuesday, after I built a large addition on my Sims' house and hit "Save and Quit." The game began to save like normal, but then I got a windows error message that said that the Sims had crashed and I would have to exit the application. The save did not take place, and my Sims lost their awesome basement... and also two of their kids (who had been born in the time that I played before being unable to save).
Point is, I can't save my Sims game, and I dunno why or how I can fix it.

Tl;Dr:
Sims 3 (w/ Ambitions expansion) crashes on save and saves do not take place. How do I fix it?

2011-05-12T11:25:52Z

My Sims are all backed up on a flash drive, and I tried un-installing and re-installing the game (and the expansion.) it didn't work.

?2011-05-12T11:33:20Z

Favorite Answer

the sims 3 saves automatically. if it still does not save than the file might be corrupt. rename backup to the same name as the main save, then delete old.

?2016-11-19T01:37:03Z

with the intention to repair it, you will would desire to pass lower back in historic previous on your laptop. and particular im being extreme lol. idk the thank you to do it (my uncle does it for me whilst it occurs to me) yet you could desire to pass lower back on the historic previous on your laptop. so if it happended as we communicate, July thirteenth, you will would desire to pass lower back to a diverse date that it replaced into working fantastic jointly with the day previous. i be attentive to this sounds loopy yet its actual. call somebody from the laptop enterprise that might actually assist you or seek approximately it on line. this isnt a jk. in doing this, you will delete all of issues you probably did after that date. so in case you pass lower back to the day previous, each thing you probably did as we communicate wont be there. the thank you to stay away from this wuld be to lower back up your laptop EDIT: i be attentive to this sounds loopy yet its no longer! im being one hundred ten% extreme! i swear! i choose i new the thank you to do it yet i dont. all your doing is reversing the historic previous on your laptop