For my old Dell XPS 15 9530 I succeeded in editing the boot/splash logo. This was a laptop with an AMI APTIO UEFI. 1. Extract the .rom file from the BIOS executable using the /writeromfile command line parameter (not required) 2. Load the .rom file (or just the BIOS .exe) in Phoenix Tool 3. In the DUMP folder, change the extension for all files to .bmp and find the boot logo 4. Edit this logo and make sure all the file properties stay the same (color depth etc) 5. Change the extensions back to .rom and finish in Phoenix Tool 6. Flash the generated .rom file using AFUWINx64.exe 7. Done On my new laptop, a Dell Latitude E7470, the BIOS is not of the same kind. I'm not sure what kind of BIOS this is to be completely honest. I like to refer to it as a Dell business computer BIOS. Attached you will find a screenshot of a BIOS page so you will probably know what I'm talking about. So here I began my journey in trying to edit the boot logo. My first task was trying to get to the .rom file. As you're all probably aware, the command line parameters (/writeromfile and /writehdrfile) stopped working with the new BIOS executables. Fortunately, also this .exe file can be loaded in Phoenix Tool. Also there is a Python script that can be used to decompress the BIOS: https://forums.mydigitallife.net/threads/i-present-you-a-tool-to-decompress-dell-uefi-bios.44785/. So now I can let Phoenix Tool create a DUMP folder in which hundreds of files appear, rename all those to the .bmp extension and find my boot logo. Edit this, rename to .rom and get a nice edited .hdr file. This is where my adventure hits a wall. To this day I have found no clue on how to flash this .hdr file onto my notebook. I've tried a lot: - Use the built in BIOS updated on the F12 boot menu --> Fail - Use the BiosUpdate.exe from Dell --> Fail - Find a recovery filename, place on USB and boot up with some key combo --> Fail - Use some dos tool for bios flashing, (Intel FPTW, and more but at this moment I fail to remember which) --> All of them Fail So I'm stuck here. I'm willing to try some tools on a Dell Optiplex 9020 which I think uses the same type of BIOS. If someone has succeeded in flashing a edited BIOS on a new Dell business system, please post your findings here and I will be forever grateful.