Re: THE SIMS 4 KEEP CRASHING SINCE SWITCH TO EA APP. Sims * itself down.
@MotherOfAMiracle As a test, please try playing in a clean user folder, that is if you haven't already. Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop, and when you launch the game, a clean folder will spawn with no content. (Your saves and other content will be intact in the folder you moved but temporarily not read by the game.) Don't add anything to the new folder yet; just let me know whether you can get far enough to start a new save and play in live mode for a bit.
If you still can't play, please run a dxdiag and attach it to a post.
https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/
For the messages about Origin not being installed, when exactly do you see these: after closing Sims 4, or some other time? Please also post a screenshot of the message. Please translate it if your native language doesn't use the Roman alphabet; otherwise, leave it as it is.