Can't remove BIOS splash image file from other company

[McDx]

Hi there. I purchased two NUC7i3BNK NUC's used. When I boot the previous company has a custom BIOS with their logo on the splash screen. 

I downloaded the stock .bio file from intel. I held the power button down for 3 seconds to enter the BIOS recovery menu. I went through the process loading the .bio using the recovery option in the menu. The custom image is still showing up. Any help would be greatly appreciated. Thank you 

[AlHill]

The bios will not correct or reset a custom image that has been applied.  For that, you need the VCUST tool:

https://www.intel.com/content/www/us/en/download/19434/intel-vcust-tool.html

Doc (not an Intel employee or contractor)
[Maybe Windows 12 will be better]

[n_scott_pearson]

Once a custom image has been applied, the original Intel image is lost. It will not overwrite a custom image with the default image included in the Intel stock .BIO file; you need to prepare your own custom image, load this image into a .BIO file and then install this .BIO file.

...S