If you bought the game legitimately but lost the case, or if you are reinstalling on a new computer and the installer isn't asking for the key but the game rejects it later, you may need to manually input the correct key into your system registry.
If you have lost your CD key but own the physical disc, some versions of Zero Hour allow you to skip the key during installation, forcing the game to ask for it again on launch. how to change serial number generals zero hour
. This is often necessary to resolve the "serial number already in use" error during LAN play or the "invalid serial number" error when trying to log in online. Step-by-Step Registry Method Open Registry Editor , and press Enter. Navigate to the Zero Hour Key : Follow this path on the left sidebar: If you bought the game legitimately but lost
: If you face "Invalid Serial Number" errors in multiplayer, try entering the key without dashes . If your buildings blow up immediately (anti-piracy check), try entering the key with dashes (e.g., XXXX-XXXX-XXXX-XXXX-XXXX ). Option 2: Use GenPatcher (Automated Fix) This is often necessary to resolve the "serial
