How To Fix : Installation Failed: Please make sure your game has latest software update and try again
Measures :
1. Place the files and TG.exe Unblock.exe in a new folder.
2. Copy all your files Sims3pack to this new folder.
3. Click and run Unblock.exe.
4. Please wait while your files are unlocked.
5. Wait for the message: All done! Just quit.
6. Copy your files unprotected folder to your Documents \ Electronic Arts \ The Sims 3 \ Downloads
7. Start the game from Launcher, click the Download and install all you want normally.
link: http://www.mediafire.com/?i98jpar40gi55xi
Thanks To: TheSims3TG.com