I use Opera, works perfectly. Btw do you use WinRAR to download your store content? Because you should, others may have viruses.
Make sure your game is updated to 1.67 (you can check on the launcher, lower left corner)
If that is the case, there's a log which can be found in documents/electronicarts/thesims3 and is called Sims3LauncherLogFile.log
Post the content here
I don't work or have any association with EA. I give advice to the best of my knowledge and cannot be held responsible for any damage done to your computer/game.
Please only contact me via PM when asked to do so.
I had the same problem and looked around on other sites - I think it was Carls Guide (that site's amazing!). My problem seemed to be solved by ejecting the sims disc then restarting launcher, then downloading and everything was fine. Phew! I'm using firefox on mac.
Every time I start the game I get disc authorisation failure, but a second retry is usually a winner...
My problem has been that I can download and install store content, but it does not show up in my game. I have performed the procedures recommended and it did not help. I have my games through Origin, so I don't think it even looks at the files from Electronic Arts.
I have contacted an EA rep and will post if there are any positive results.
Hello. Do you still have this problem? If so I suggest you re-install the game. As I am typing this The Sims 3 is installing. And probably by the time you see this, it would have completed. I have read all the posts here. Many suggest to use a different browser. I will do so. I hope EA answers to everyone who has this problem. We have paid money to get the store content and of course, we want to download it, install it and play.
Hello to everyone again. The Sims 3 finished installing. First, I would like to thank everyone who has answered to this problem! Without the information I would be clueless! I first made sure the game launcher was up to date. I then used Internet Explorer and tried to download a piece of store content. It downloaded and then it installed with no problem too. I do know The Sims 3 is old but I still love it and play it! I hope none of you are facing this problem anymore.
Thanks again to everyone who has posted about this issue!