This is caused by Windows Defender's kernel-level protection policy performing a silent quarantine on the trainer. You can fix this by setting the item to 'Allow on device' in your Protection History. Especially in Windows 10 and 11, the system is highly restrictive toward .exe injection behaviors.
Manual Recovery Steps:
1. Path: Go to [Settings] -> [Privacy & security] -> [Windows Security] -> [Virus & threat protection].
2. Action: Click on [Protection history] and find the GameBuff entry marked as 'Severe'.
3. Authorize: Click the [Actions] button and select [Allow on device].
4. Environment Note: GameBuff only supports physical Windows systems; it will not pass interception validation in cloud PCs or virtual machines.
Official Site: https://gamebuff.cn
