Using keys found online often leads to the "Invalid Serial Number" error because the key is already in use or blacklisted by the developers.
Always run the installation file and the game itself with administrator privileges. Right-click the shortcut and select "Run as administrator" to prevent permission errors. Software Prerequisites: city+car+driving+serial+number+159+work
: When the startup window appears, copy your serial number from your email and paste it into the provided box. Using keys found online often leads to the