sims4 switches to desktop by itself

Hey @dandelioness,

Are you sure you are playing the game in full screen mode? Here are some of the common troubleshooting steps for PC users that may help you.

For Game performance

1> Repair the game:
https://help.ea.com/uk/article/i-cannot-load-my-game-from-origin-or-i-am-having-issues-in-game
2> Disable Origin Overlay : http://help.ea.com/en/article/origin-faq/#7a
3> Run the game as Admin : http://help.ea.com/uk/article/how-do-i-run-a-program-or-a-game-as-an-administrator/
4> Check if there is any program that may conflict with Origin :
http://help.ea.com/en/article/programs-that-may-cause-conflicts-with-origin/
5> Clear temp files using CCleaner : http://help.ea.com/en/article/how-to-use-ccleaner-to-fix-pc-issues/
6> Create a new Admin : http://help.ea.com/uk/article/how-to-create-a-new-admin-account/
7> Clean Boot : https://support.microsoft.com/en-us/kb/929135

Please try them and let me know if they helped you.

*** Please grant XP and Accept as solution if my suggestion helped. It will help me as well as anyone facing this same issue. Cheers and happy gaming. 👍 ***