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Cache Files: There is a step by step here on Clearing Cache Files (you can also move it to the desktop instead of deleting if you want to be on the safe side).Another idea for you is to to a Clean Boot of your pc.

Here's a troubleshooter. and another troubleshooter post by Crinrict

Have you checked the current System Requirements for running the game?

2 links that may help you with the requirements as they increased quite a bit for the game to run well.

• 1st link

• nd the 2nd  

• Apart from culling your folders one by one, or the  50/50 method, to narrow down the broken cc or mod, that is all you can do, (restarting and checking your game each time) you'll simply need to find the broken mod/cc it and remove it
  
  
• Mods & cc are well known to cause various in-game issues please check for updates to them / where you found them; do this also > after any sims update or adding a game pack,

  It's up to the artist of particular cc & mods to keep them compatible with the game, and if you use them, then check your game after each patch etc.. you may need to find the culprit affecting your game.  Also,  if you are new to using cc/mods please check my post here on maintaining your game.  as there are many tips including the 50/50 method and tools to help you fix your game and how to find the broken mod.
  
  

  Then run your game vanilla, while checking mods and cc, with the cull method;

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  The following flowchart is From here: Sims Wiki  also there's a good guide at Carls Sims Guide to find broken cc/mods