If you are still using Windows 8.1 and you cannot redeem your serial number with EA, then this will probably work for you. https://www.reddit.com/r/simcity4/comments/3kmfmi/quick_and_dirty_solution_to_recent_windows_update/ Follow the instructions on the above link. I would like to note that this will NOT work on Windows 10, so if you need to play SimCity 4 on your current Windows 8.1 computer, do not update to Windows 10 until you can get a digital copy.  
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