Always make a backup of the files that are overwritten by the File Archive, as the original files are usually required to update the game to a newer version or to play Online!
Some No-CD/Fixed EXE files work fine in Single Player mode but are detected to be modified when trying to play online. When this happens use the original EXE to play online, else you could find yourself banned from the game!
When using Fixed Files make sure to use a Firewall which controls outgoing traffic as some games want to report the use of these modified files!
Some original games do not work when a certain application has been installed, like DAEMON Tools. In most cases using a No-CD or Fixed EXE will solve this problem!
Some Game Trainers are sometimes reported to be a Virus or Trojan, the most common is a keylogger called HotKeysHook or the file has been packed/protected with VMProtect or Themida and is recognized as Win32/Packed.VMProtect or Win32/Packed.Themida. In ALL cases this is a FALSE ALARM as NONE of the Game Trainers @ GCW contain known malicious code! More info in the PC Games FAQ!
If you have problems using a trainer in combination with Windows Vista, 7 or 8 then make sure to run the trainer with Administrator rights and when needed in Windows XP or Windows 98 compatibility mode!
ALL available trainers are for Single Player/Offline use ONLY! Don't try to use them online else your account can/will be banned/closed!