
1) Windows-only freeware
Found on
https://www.crosswordclues.com/clue/bootskin

BootSkin is a computer program for Microsoft Windows 2000, Windows XP and Windows Vista that allows users to change the screen displayed while the operating system is booting. It is made by Stardock, and distributed for free under the WinCustomize brand. BootSkin uses a boot-time device driver (vidstub.sys) to access the display directly using VES...
Found on
http://en.wikipedia.org/wiki/BootSkin
No exact match found.