Tried to reinstall my sims 3 game code invalid

@3079frozen Sims 3 does not like to be re installed and usually a re install is not required. There are posts about how to return the game to factory without re installing. Is your computer a pc or mac? If your computer is a pc you need to clean the registry with a program like ccleaner (there is a free version) after you un install the game. In the old days if you had problems with a program you un installed it and re installed it. Sims 3 is different because expansion packs build on the base game and this makes the game more complex. If you are getting an invalid code you are entering the code wrong - a S for a 5 or an 8 for a B maybe. If you have already registered the game you can not re enter the code. You need to use the account the game was registered to.