Have the same issue. Played for 13 hours straight yesterday without a hitch and now can't even get past the plumbob screen. No changes made to the PC's settings or programs since so seems totally random.
I have tried:
Launching the game with Origin in 'offline' mode.
Reinstalling Origin
Launching the game in windowed mode (running with the prompt "w -und)
Launching the game as administrator
Launching the game in compatibility mode
Repairing game (via Origin)
Nothing has been successful.
- Got it working on my own. No idea for how long though -
Dont know which thing it was so i'll just post everything I did:
Ran a MalwareBytes threat check (nothing found)
Ran a CCleaner registery check (minor things found and cleaned up)
Despite having uninstalled AVG some time ago it was still running in the background of my PC so i used ctrl, alt, del - task manager - processes - to end all avg processes (and finally deleted the damn files off my C drive)
Restarted origin (as administrator)
Launched Sims 4 in windowed mode (also as administrator)
And now for some reason it's worked on this occasion. Who knows for how long.