Forum Discussion
@eventoowish Please uninstall Sims 3 and the EA App with Revo Uninstaller (the free version is fine), to remove all related hidden files. Restart your computer, reinstall the App, and then install Sims 3 into a new folder that you create for just this purpose. So rather than installing directly to D, for example, install to D:\Games or whatever you happen to call the new folder.
Please use only the Task Manager method for now, not the PowerShell script or the Alder Lake patch. It's the most reliable approach and therefore the best way to eliminate potential complicating factors.
If this doesn't help, please look for new errors in the Reliability Monitor. Hit Windows key-R and enter "perfmon /rel" without quotes, and you'll see a chart of errors and updates with a column for each day. Today is on the right.
Look for an error that happened at exactly the time of your most recent attempt to launch Sims 3, specifically after you've done the steps I listed. If you find one, double-click it to see more details, then copy that info and paste it into a reply here. If you don't see a new error, check back in an hour or so—the Reliability Monitor doesn't always update right away.
Also, after closing the window prompt from the launcher, a mini window with the error message shows up:
Unable to start game
Service initialization failed (0x65d0274)