Re: my sims wont launch after installing mods
You've clearly got a mod issue and the only way to find which one is causing the problem is to test them. Chances are that you only have a few mods and most of what you have is CC. CC rarely causes a game launch issue so you should start with the mods first.
You will need to move your mods folder to your desktop or elsewhere on your computer out of the game path. Then create a new, empty, mods folder. Move or copy one mod into the new folder and start the game. If it launches, then quit and add another one to the folder and launch again. Rinse and repeat until you find the one stopping the game from launching. Do not save the game while you are doing the testing. Once you've found the mod stopping the game launch, either remove it or see if you can find an updated version. Don't stop until you've tested all of your mods. You may have more than one broken mod, so test them all. If you go through all your mods and don't find the problem, then look at your CC without any mods in the folder. I suggest using the 50/50 method for your CC.
One CC related thing I do know that will keep the game from launching is if you inadvertently put a TS3 CC item in your mods folder (been there, done that) so if you installed any CC just prior to the problem starting, check that CC to make sure it is for TS4.
Hope this helps.
