A .tmp extension indicates that the download process was forcibly intercepted and locked midway by Windows Defender or third-party antivirus software. This happens when the security software's real-time scanning interferes before the file transfer is complete, preventing the temporary file from being renamed to .exe. You can resolve this by temporarily easing security restrictions and re-downloading.
Three Steps to Resolve:
1. Remove Environmental Interference: Temporarily disable Windows Defender's 'Real-time protection' or exit third-party antivirus programs like 360 or Tencent Manager.
2. Clean Up Residual Files: Go to your download directory and completely delete the unopenable .tmp file to prevent cache conflicts.
3. Re-download via Official Direct Link: Use the official standard download address: https://dl.gamebuff.cn/download/GameBuff_Setup.exe. After downloading, right-click the file to verify that the digital signature belongs to Game Buff Technology Co., Ltd.
Official Website: https://gamebuff.cn
