Update
2015-03-26: This issue should now be solved. Close your Origin client and reopen to be prompted for a new update. This should solve the problem.
Problem
My game does not start anymore and I only see a small window. The game does not react at all.

Cause
This issue is caused by Origin in game. It occurs since Origin Update 9.5.10.
Solution
Deactivate Origin in game. If this doesn’t work, try restarting Origin afterwards and make sure ts4.exe is not running in the background.
How can you help
To help EA fix this issue, please do an Origin Error Report and post your Origin Report ID in this thread: INFO REQUEST] Sims 4 starting in small window/Not starting
Further Reading
[FIXED] Game starts in small window and doesn’t react
Update
2015-03-26: This issue should now be solved. Close your Origin client and reopen to be prompted for a new update. This should solve the problem.
Problem
My game does not start anymore and I only see a small window. The game does not react at all.
Cause
This issue is caused by Origin in game. It occurs since Origin Update 9.5.10.
Solution
Deactivate Origin in game. If this doesn’t work, try restarting Origin afterwards and make sure ts4.exe is not running in the background.
How can you help
To help EA fix this issue, please do an Origin Error Report and post your Origin Report ID in this thread: INFO REQUEST] Sims 4 starting in small window/Not startingFurther Reading
By crin • Fixed Error • Tags: Origin, Origin In Game, Startup