The BGRT, or Boot Graphics Resource Table, is a part of the UEFI specification. It is a small, specialized table stored in the firmware that contains the logo image you typically see during boot, often the manufacturer's emblem (e.g., Dell, Lenovo, ASUS). When Windows is booting in a UEFI environment, it reads this table and displays the image stored there. Unfortunately, permanently changing this image is intentionally difficult. It is a feature meant to be OEM-controlled, not user-modifiable.
Defending against firmware-level attacks requires a layered approach focusing on securing the boot process. 1. Enable Secure Boot
: Your custom logo must be properly formatted, typically as a 24-bit BMP image file, usually saved as splash.bmp . Step-by-Step Installation Guide hackbgrt151
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Permanently rewriting this graphic inside the motherboard's flashed BIOS/UEFI firmware is incredibly difficult and highly risky. HackBGRT solves this problem by functioning as a . Instead of overwriting your actual motherboard firmware, it intercepts the boot process, temporarily replaces the image stored in the volatile BGRT memory pool, and then hands control back over to the Windows Boot Manager. Technical Prerequisites The BGRT, or Boot Graphics Resource Table, is
HackBGRT is a powerful tool for visual customization, transforming the mundane boot process into something personal. By following the steps closely—and taking the proper precautions—you can easily install a custom startup logo on your PC. If you have questions about a specific error message,
bootrec /fixMbr bootrec /fixBoot bootrec /scanOs bootrec /rebuildBcd released in August 2018
Provide instructions on creating the perfect custom logo for different screen resolutions.
This usually occurs if you are not running the setup.exe as administrator or if your antivirus software is interfering. Disable your antivirus temporarily (including Windows Defender’s real-time protection) and ensure you right-click setup.exe and choose "Run as administrator".
is an open-source tool designed to change the boot logo on UEFI-based Windows systems. Version 1.5.1 , released in August 2018, is a legacy version of this utility that allows users to overwrite the default vendor or Windows logo displayed during startup by modifying the Boot Graphics Resource Table (BGRT). Key Requirements & Precautions