I thought this was a silly solution but I was at my wits end and willing to try anything. That means in program files, as well as in my documents, and yes, any mods or anything you have on your computer pertaining to the sims 3. I then came across a post online that said to uninstall and then go in and manually delete every Sims 3 or EA file on my computer. I un-installed and re-installed and used your update and tried compatibility mode and every combination of these possible but it simply would not work. When I clicked on the icon I would get the “thinking” circle for a few seconds and then nothing.
I had Sims 3 on my Windows 8 64-bit PC months ago, but when I went to play recently I found that it would no longer work. Hi Ramoonus, I just wanted to post a solution here that worked for me.