Re: The Sims 3 .net framework 3.5 problem
@Naweeya Sims 3 definitely requires .NET Framework 3.5 whether you're playing through Origin or the EA App (or disc or Steam). Normally, Windows would install it as the game calls for it without the user needing to do anything except agree to it. It sounds like you might be getting this prompt, and if so, just accept it.
Or you can install manually. Hit Windows key-R and enter "appwiz.cpl" without quotes, then click "Turn Windows features on or off." .NET 3.5 should be at the top of the list. If the box next to it is empty, click it to install, and when it's finished, restart your computer. If the box is filled, that means it's already installed. Click the box to uninstall, restart your computer, then install is as above and restart again.
If this doesn't help, please run a dxdiag and attach it to a post.
https://help.ea.com/en/help/pc/how-to-gather-dxdiag-information/