well.. the proper way.. as microsoft would probably tell you .. is not to do it.. because i believe the pictures for startup screens are imbedded in exe's.
It’s now easier than ever to add a custom boot screen to your Steam Deck. And trust us, if you have a Steam Deck and haven’t considered doing this yet, you should. There are some really cool ...
Custom Steam Deck boot videos are all the rage, and Valve's latest beta update makes it even easier to use your own start screen. The newest patch also addresses quirks with startup haptics, and ...
At BlackHat EU, Binarly showed how custom boot logo features could be exploited by crashing vulnerable image parsers, report SecurityWeek and ArsTechnica, allowing them to take over Windows and Linux ...