@MarLove6 The errors themselves wouldn't explain why Sims 3 isn't working, but they could signal other issues that explain the problem. It's difficult to say without fixing the system errors, as in, the ones that lead to DISM and sfc not working. If you'd like to do that, let me know, and I'll post instructions. I'd also like to take a look at a dxdiag.
https://help.ea.com/en/help/pc/how-to-gather-dxdiag-information/
If you're ready to get a new computer instead, it's kind of a moot point though. And before you rebuy everything on Steam, which is not a bad plan in the grand scheme of things (no mandatory Origin tie-in, no being forced to start the game through the launcher), you may want to install from Origin on the new computer to see whether it works this time around.
@puzzlezaddict I tried EA support again and it's fixed!! A support person named Akash helped me out. He replaced my base game and voila, it's working!!
