Running an unlock tool directly from a compressed folder can corrupt its virtual memory layout. Always extract the entire archive to a folder like C:\UnlockTool\ before launching.
Look for known magic bytes:
If the corruption is within your operating system, use the built-in System File Checker (SFC) and DISM tools via Command Prompt: binary is corrupted unlock tool
If the unlock tool is for a smartphone or embedded device (like Qualcomm or MediaTek tools): Running an unlock tool directly from a compressed