Windows reportedly tries to export a kernel dump during a long power-button hold

A prolonged power-button hold reportedly prompts Windows to try exporting a kernel dump after about eight seconds, before what the account describes as a hardware shutdown at 12 seconds. The dump can be incomplete, and its diagnostic information includes whether the screen is entirely black. Chen’s Windows 3.1 anecdote offers a different explanation for one apparently blank screen: a customer had set every available color to black.