I have a copy of SimCity 2013. It's a great game, and I'm enjoying it very much.
Unfortunately, most of the time when I go to start it up, I get an "ERROR 3000" window and the game crashes.
I have stumbled on a way to get the game to run.
In WINDOWS XP, you need to go to your START menu, and choose RUN. Then type in "regedit"
Navigate through to HKEY_LOCAL_MACHINE/SOFTWARE/Maxis/SimCity
The "DisplayName" field had data set as "SimCity?"
Right-click on the DisplayName field and hit modify, and then remove the ? in the data field. Exit the editor and start the game again. Now it should start up fine.
The next time you go to start the game, the error will likely appear. Simply go back into regedit, and if you haven't used it for anything, it will open back up where you left it last time. Put the question mark back into the DisplayName field and exit again. The game should start again.
Just continue modifying the DisplayName field each time this error comes up, and it should continue getting you into the game.
Why does this work? I have NO IDEA! I just know that it has worked for me every time I try to start the game and get the ERROR 3000.