Conclusion HackBGRT provides a practical, non‑firmware approach to customize the Windows UEFI boot logo by inserting an EFI loader that draws a user-supplied image. It is powerful for personalization but carries real risks around TPM/BitLocker, UEFI boot entries, and potential incompatibilities with Windows updates and firmware behaviors; it is recommended only for knowledgeable users who prepare backups and recovery options.
: Use an image smaller than your screen resolution to avoid distortion.
HackBGRT is a UEFI-based boot logo changer. Unlike older methods that modified system files, HackBGRT works by utilizing the Boot Graphics Resource Table (BGRT)
When a UEFI computer boots, Windows displays a vendor logo stored in the system's firmware. HackBGRT-1.5.1 intercepts this process by:
HackBGRT works by installing a custom UEFI application that overwrites this BGRT logo during the boot process. It allows you to: the default Windows startup logo.
To appreciate what HackBGRT 1.5.1 achieves, it is important to understand the handoff between firmware and your operating system.
| Tool | Approach | OS Support | Resolution Limit | Ease of Use | |-----------------------|---------------------|---------------------|------------------|-------------| | Hackbgrt-1.5.1 | ACPI BGRT patching | macOS, Windows, Linux| Native (any) | Moderate | | EasyUEFI Logo Boot | UEFI firmware flash | Windows only | Often 800x600 | Risky | | rEFInd use_boot_logo | Bootloader draw | Any (via rEFInd) | Native | Easy | | BIOS Modding Tools | Direct firmware edit| Any (dangerous) | Limited | Very Hard |
: A paint window will open with the default HackBGRT splash. Simply paste your custom image over it, save, and close Paint.
within the firmware. HackBGRT works by installing a custom UEFI application that intercepts the boot process and overwrites this image in memory before Windows starts. Requirements : A UEFI-based system (Legacy BIOS is not supported). Secure Boot : In version 1.5.1, Secure Boot must typically be to allow the modified bootloader to run. Image Format : The replacement logo must be a 24-bit BMP file, traditionally named splash.bmp What was New in Version 1.5.1?
When you restart your computer, the customized boot application loads before Windows starts, reads your configuration and image file, and then overwrites the BGRT in memory to display your custom logo instead of the original one. After that, it hands off control to the normal Windows boot manager ( bootmgfw.efi ) so the rest of the startup process proceeds as usual.
: The tool does not work on older BIOS/Legacy systems. You can verify this by checking System Information ( msinfo32 ) for "BIOS Mode: UEFI".
The BMP format might be incompatible. Ensure it is uncompressed, 24-bit BMP. Also, verify the file path in config.plist .
Rare but possible with very old UEFI firmware (pre-2016). Remove the driver by booting from a USB rescue stick and deleting the entry from config.plist . You may need to disable Above 4G Decoding in BIOS as a workaround.