Some boards (like ASUS) use .CAP files with security signatures. MMTool can edit them, but you may need a USB Flashback feature to bypass the signature check during flashing.
The biggest risk when searching for is visiting unverified third-party sites that bundle malware, adware, or fake installers. Follow this safe path: Mmtool 5.0.0.7 Download
Search for “MMTool” repositories maintained by BIOS modders. Ensure the repository has stars and active discussions. Some boards (like ASUS) use