Re: The Sims 3 will not launch through Steam
@Haruseok If you do have a 12th-gen Intel processor, please see the accepted solution in this thread:
A Steam install would mean applying the workaround of your choice to TS3W.exe, with the W; an EA App install uses TS3.exe, without the W.
If that doesn't help, please create a new thread and attach a dxdiag. Here's how to run one:
https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/
Since this thread is somewhat old, I'll lock it here.