The Blue Screen of Death (BSoD) is a critical error screen displayed by the Microsoft Windows operating system in the event of a fatal system error. It is also known as a Stop error or bugcheck. The screen is blue, hence the name, and displays a text-based error message that indicates a system crash or critical condition.

The BSoD can occur due to various reasons such as hardware or software issues, driver problems, or system file corruption. When a BSoD occurs, the system is forced to shut down or restart to prevent further damage.

The text on the Blue Screen of Death typically includes a error message, a stop code, and sometimes a parameter description. The error message provides information about the cause of the error, while the stop code is a four-part code that helps troubleshoot the issue. The parameter description provides additional information about the error.