Here's a list of common Game Guard error messages and solutions that may help you. The Game Guard Direct FAQ will also be listed at the very bottom for your reference~

Error Message 100
Solution- PC is infected with virus, spyware, adware, and/or malware. Please update the vaccine t a recent version and process an overall scan. If the error code still appears after the scan, it could be a virus that the current vaccine cannot detect.

Error Message 114
Solution- There may be a program that is occupying a big portion of your CPU or video driver and/or the sound driver may not be up to date. Please cure all viruses, spyware, adware, and/or malware, then update the drivers to recent version

Error Message 124, 150, 153
Solution- Please update the GameGuard files (GameGuard.des and GameName.ini) manually

Error Message 350
Solution- Close the launcher and re-try. Error message is due to the program being closed while it is still updating

Error Message 360
Solution- Right click on the hard disk drive- tools- disk scan- and erase the entire GameGuard folder. Manually download the patch files and run the game

Error Message 361
Solution- Pleae check your internet settings and wiring. Check whether you are using any security programs such as itop. Please check whether you need any verificatin before connecting to the internet.

Error Message 380
Solution 1- Download the GameGuard installation files and try re-installing. If you are using Windows XP service pack 2, check the firewall settings. In some cases, it could be solved by re-booting the PC
Solution 2- Firewall programs such as Sygate Firewall may be blocking GameGuard. Start the corresponding firewall(s), and check whether GameGuard.des is included in the "Blocking List"

Important Error Codes:

NPGAMEMON_ERROR_EXIST (110) – GameMon is already running. Either close GameMon process or reboot and execute again.

NPGAMEMON_ERROR_GAME_EXIST (115) – Game is executed multiple times, or GameGuard is already running. Close the game and restart.

NPGAMEMON_ERROR_NPSCAN (112) – Failed to load modules for checking viruses and hacking tools. Possible causes are lack of memory and virus infection.

NPGAMEMON_ERROR_INIT (114) – Failed to initialize GameMon. Try rebooting or closing possible programs that can cause a collision.

NPGAMEMON_ERROR_AUTH_GAMEGUARD (124) – GameGuard.des file does not exist or is modified. This can be resolved by installing GameGuard setup file.

NPGAMEMON_ERROR_AUTH_INI (120) – Setup file for GameGuard does not exist or is corrupted. Download Setup file for GameGuard and install at GameGuard folder.

NPGAMEMON_ERROR_CORRUPT_INI (141) – Setup file for GameGuard does not exist or is corrupted. Download Setup file for GameGuard and install at GameGuard folder.

NPGAMEMON_ERROR_CORRUPT_INI2 (142) – Setup file for GameGuard does not exist or is corrupted. Download Setup file for GameGuard and install at GameGuard folder.

NPGAMEMON_ERROR_NFOUND_INI (150) – Setup file for GameGuard does not exist or is corrupted. Download Setup file for GameGuard and install at GameGuard folder.

NPGAMEMON_ERROR_CRYPTOAPI (155) – Windows System file is damaged. It is recommended to check virus, and reinstall Internet Explorer or rsabase.dll in the system folder according to Internet Explorer version.

NPGAMEMON_ERROR_EXECUTE (170) – Failed to execute GameGuard process. Reinstall the GameGuard setup file and try running the game again.

NPGAMEMON_ERROR_ILLEGAL_PRG (200) – An illegal program has been detected. Close unnecessary programs and try again.

NPGAMEMON_ERROR_GAMEGUARD (230) – It is a GameGuard initializing error or an old version of GameGuard file is being used. Re-install the set-up files and try restarting the game.

NPGMUP_ERROR_PARAM (320) – ini file does not exist or has been falsified. This could be solved by installing the GameGuard set-up file.

NPGMUP_ERROR_INIT (330) – npgmup.des initializing error. Delete the GameGuard folder and restart the game.

NPGMUP_ERROR_DOWNCFG (340) – Failed to download. Network might not be stable currently, internet settings might have some problems, or check the firewall.

NPGMUP_ERROR_ABORT (350) – Cancel(Abort) button has been clicked while updating. If it is due to the failure of connection, try connecting again or confirm its network status.

NPGMUP_ERROR_AUTH (360) – Update is not successful or GameGuard file is corrupted. Try again in a minute, or check the firewall settings.

NPGMUP_ERROR_CONNECT (380) – Failed to connect to the GameGuard update server. Try connecting again in a while, or check the network connection.

Game Guard FAQ:
http://www.gameguard.co.kr/gameguard/faq/eng/index.htm