Hi!
For me starting the games as admin,opt out of interactive loading screens and if that didn't helped then deleting the whole documents/Electronic Arts/The Sims 3 folder helped.
To make sure the game starts as admin you need to go to the game's folder where the launcher and the client located. For me it is E:\The Sims 3 Szigetvilįg
\Game\Bin Here you can find the
Sims3Launcher.exe and the
Sims3EPXY.exe (The XY is replaced with the expansion pack/stuff pack number. For me it is island paradise wich is EP10 so it is Sims3EP10 for me.) . Right click and properties>compatibility> and at the button "
Run as administrator". Do this to both the Launcher and the client. It fixed the endless loading screen for me.
Your save file may be semi-corrupt. For this i can recommend clean-up tools such as OverWatch and MasterControl. Just install them to your game as a mod and go to the town center>Nrass>MasterControl>Town>Reset all. This handy little feature will fix most of the bugs and boost your FPS a ton. This is only usefull if you try to load a game,not starting one. OverWatch will run in the background and net out bugs like stuck sims what EA refuses to patch. Using theese 2 mods my save file never got corrupt (stuck at load or disapeard from main menu or loaded without sims).
Don't worry about EA. EA is about greed and what you see as the sims series is more of Maxis's work than those capitalists. If you want help you WILL find someone on this forum :3.
I hope your problems will get fixed!
(Sorry if i am misguiding you. My sims is hungarian so i am trying to translate.)
Edit:
Oh,and yes. Clear the caches. XY:\Yoursimsfolder and delete the caches folder. It all can go. Edit2:
http://www.carls-sims-4-guide.com/forum/index.php/topic,20732.msg401809.html#msg401809This is How you should do it :/