unable to load the city at this time. please try again later

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@JoelCadence wrote:
I've uninstalled the updates. I was wrong; it wasn't them.... *sigh* Well back to square one.

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You're getting the message "Unable to load the city at this time. Please try again later" in Single Player mode, too? That is really strange. 

You mentioned the security updates, and even though uninstalling them didn't work, it did make me think about some security issues that can block SimCity. It's possible that one of the updates changed some settings that didn't change back after you uninstalled. It could be related to User Access control.  First, set Origin.exe and SimCity.exe to "Run As Administrator".  Try this:

Disable UAC:

1. Press the Windows key and X.
2. Click on Control Panel.
3. In the search box, type uac, and then click Change User Account Control settings.
4. To disable User Access Control:
   • Move the slider to the Never notify position, and then click OK.
   • If you're asked for an administrator password or confirmation, type your password or provide confirmation.
   • You will need to restart your computer for UAC to be turned off.
5. Once you've restarted, launch your game. 
6. Let it run for a few minutes and then exit out of the game. 
7. Search for uac again and hit Enter.
8. To re-enable User Account Control:
   • Move the slider to choose when you want to be notified, and then click OK.  
   • If you're prompted for an administrator password or confirmation, type your password or provide confirmation.

It's a long shot, but maybe that will get you in to your city. If your single player mode is not loading, but it's not giving the "please try again later" message, start a new thread for that problem. That way, we can keep it separate from this thread's issue. Fingers crossed this works!