Hey everyone! So I was like you all yesterday and was nervous that I wouldn't be able to play sims 3 because the 64 bit version wasn't showing up yet in my origin account. I contacted EA twice, and the first time they weren't helpful at all. The second time, I was able to get my entitlements super easily. For reference, I purchased all of my games originally through origin, and the 64 bit versions didn't show up until I contacted customer service.
Prior to installing the game, I deleted my old sims 3 folder under "electronic arts." I also deleted the old launcher for sims 3 32 bit by going under "application settings" in origin, then "installs and saves", then click "delete all installers." Or, if you have other games not related to sims, just click "browse installers" and delete all of the installers related to sims 3 32 bit.
After all of that was done, I just installed my base game and all of my expansion packs (ambitions, generations, island paradise, late night, pets, seasons, supernatural, university life, and world adventures.) I didn't get any error messages and was able to launch the game and get past the main menu.
I hope that this helps everyone! Wishing you guys all the best of luck.
P.S. I can already tell that the game is much faster/smoother and loads much more quickly.
