Microsoft has seemingly retired the iconic Blue Screen of Death (BSOD) that traditionally occurs when something goes severely wrong in its Windows operating systems. As discovered by early Windows 11 adopters who have tried out the latest preview and suffered crashes and other serious issues, the Blue Screen of Death is no longer blue colored, but black. According to some speculators, the reason for this change is so the Blue Screen of Death matches the new black log-on and shutdown screens. Nothing has changed between the new Black Screen of Death and the Blue Screen of Death in terms of the level of information provided, however.
Microsoft first introduced the BSOD in Windows 3.0, offering a way for IT professionals and support personnel to diagnose hardware and memory faults. A BSOD is Windows’ own kernel error or bug check, and it usually includes a dump of data that can help system administrators analyze what system fault caused the blue screen.
Source: The Verge