Solved
Why won't Sims from The Exchange download into my game
My Sims 3 game downloads all custom content from different sites but when i try to download whole sims my launcher says "Installation failed: Please make sure your game has the latest Software Update...
@thankyou4venom It's always possible that your antivirus software is getting in the way, although if you can download other items, that seems like less of a possibility. Some people have had success running the game as an administrator (right-click on the icon to show the option).
But I think your best best is reading crinrict's blog post concerning this error. Depending on the cause of the issue, there are several things you can do to fix it.
https://sims3.crinrict.com/en/2014/02/exchange-content-cannot-be-installed.html
