If you're having trouble activating a legal copy, try running the game as an Administrator
Sites offering "free" keys or cracked "repacks" are notorious for hosting malware, spyware, and ransomware that can compromise your personal data. Constant Validation: The legitimate version of City Car Driving City Car Driving 1.5.9 Activation Key Free REPACK
If you already own a standalone serial number from an older purchase, the developers offer a way to get a free Steam key in exchange for your current serial number on their Official FAQ Page Steam Store: Purchasing through the Steam Store If you're having trouble activating a legal copy,