The installer will launch Paint for creating the image(s).

Otherwise, check out the examples in the configuration file.

If you need only one custom image, the defaults are fine.

The installer will launch Notepad for modifying the configuration.

You may need to manually disable Secure Boot and then retry.

Start setup.exe and follow the instructions.

Get the latest release from the Releases page.

Make sure that Secure Boot is disabled, unless you know how to sign EFI applications.

Make sure that your computer is booting with UEFI.

Important: If you mess up the installation, your system may become unbootable! Create a rescue disk before use.

It's usually very difficult to change the image permanently, but a custom UEFI application may be used to overwrite it during the boot. When booting on a UEFI-based computer, Windows may show a vendor-defined logo which is stored on the UEFI firmware in a section called Boot Graphics Resource Table (BGRT).

HackBGRT is intended as a boot logo changer for UEFI-based Windows systems.

Windows 10 boot logo changer software