aadilf1 wrote:
I did as administrator and I tried to activate it again but now it says the key I entered is invalid

I'll email the support peoples!
Make sure that the product code, which is displayed in the game start up window, is absolutely the same as the product code you’ve used to obtain an activation key.
To be sure, please repeat the activation procedure carefully without any deviations:
1. Run the installed game with administrator privileges (right click on the game's shortcut and choose "Run as administrator in the context menu).
It's very important to run the game with administrator privileges!!!
2. Copy the product code from the game startup window.
And don’t close the opened program!!!
3. Follow this link -
www.activate.citycardriving.com/
4. On the web page you've just opened you should enter: your serial number, the product code you have just copied, and your e-mail.
The activation key will be displayed on the final page, after you'll click the "Activate" button.
5. Enter (just copy and paste) your activation key into the box in the game startup window and click "Registration" button.