Before you install BFBTool, you must have .NET Framework 3.5 installed. Download the BFBTool installer by clicking the Download link to the below.
After the download completes, using the Windows File Explorer, go to your Downloads folder (see below),
and double-click BFBTool_Setup.exe.zip. This will open up the contents of the BFBcerTool zip archive. Then double-click BFBTool_Setup.exe, which starts the installer.
This window appears when you start BFBTool_Setup.exe.
Click the Yes button to continue. If you didn’t install .NET Framework 3.5, you will see the following error. You must follow the instruction here to continue.
Once the installer for BFBTool installer appears, click the Next > button until you see the panel with the Finish button, and click Finish.
After you successfully install BFBTool, read BFBTool Guide.