In Microsoft Windows, a BSoD (Blue Screen of Death) is a stop error screen that appears when the system crashes. What is the background color of this error screen?

Introduction / Context:
The term Blue Screen of Death, often abbreviated as BSoD, has become famous among Windows users and technicians. It refers to a serious system error where Windows can no longer operate safely and must stop. Recognising the visual appearance and meaning of a BSoD is part of general computer awareness, especially in questions about operating system failures and troubleshooting.

Given Data / Assumptions:

• The question is about the BSoD or Blue Screen of Death in Microsoft Windows.
• The description mentions stop errors caused by faulty drivers or hardware issues.
• We are asked what color screen is displayed when a BSoD occurs.
• Options include red, grey, black, and blue.

Concept / Approach:
The name Blue Screen of Death itself gives a direct clue: the background of the error screen is blue. Historically, Windows displays a full screen blue background with white text showing error codes and diagnostic information when a critical failure occurs. Although newer versions of Windows use slightly different designs, the association between fatal system errors and a blue screen remains strong. Therefore, the color that best answers the question is blue.

Step-by-Step Solution:
Step 1: Focus on the abbreviation BSoD, which stands for Blue Screen of Death.Step 2: Recall from everyday experience or screenshots that the Windows stop error screen uses a blue background.Step 3: Compare this with other error indicators such as black screens during boot or text mode, which are different issues.Step 4: Observe that red and grey screens are not standard names for Windows stop errors.Step 5: Select blue as the only color that matches the widely used term and visual appearance.

Verification / Alternative check:
If you search for images of BSoD or view official Microsoft support articles, you will see screenshots of a blue background with text describing the error. Even the common nickname Blue Screen of Death is used in documentation and technical discussions. Alternative color names do not appear in this context, which confirms that the system crash screen is indeed blue.

Why Other Options Are Wrong:
Red is sometimes used in other applications to indicate errors, but Windows stop errors are not called Red Screen of Death in standard usage. Grey is not associated with any classic Windows crash screen. A black screen may occur when the display driver fails or during boot problems, but that is typically described as a black screen issue rather than a BSoD. Therefore, these colors do not correctly answer the question.

Common Pitfalls:
Some learners may overthink the question and consider modern design changes or assume that Microsoft has changed the color. However, despite stylistic updates, the core idea and name remain tied to a blue background. For objective questions, do not ignore direct hints in phrases such as Blue Screen of Death, which are included specifically to guide you.

Final Answer:
The correct color is Blue, which is why the Windows stop error screen is commonly known as the Blue Screen of Death.