Warm Boot (Soft Reset) on IBM-PC Compatible Keyboards Which key combination triggers a warm boot without cutting system power?

Introduction / Context:
A warm boot (also called a soft reset) restarts the computer without cycling the power supply. On IBM-PC compatibles, technicians and users commonly use a keyboard shortcut to invoke this process, which reinitializes the system while preserving power to components.

Given Data / Assumptions:

• Standard PC-compatible hardware and BIOS behavior.
• Keyboard controller recognizes specific key sequences.
• Operating system permits handling or intercepting the sequence as appropriate.

Concept / Approach:
The keyboard controller and BIOS cooperate to interpret Ctrl+Alt+Del as a request to perform a warm boot. This restarts POST-level initialization in many legacy systems without cutting power, contrasting with a cold boot that occurs when power is first applied or physically cycled.

Step-by-Step Solution:
Press and hold Ctrl.Press and hold Alt.Press Del once while holding Ctrl and Alt.System performs a soft reset, restarting the boot sequence.

Verification / Alternative check:
On many DOS or early Windows systems, invoking Ctrl+Alt+Del immediately begins the reboot process. Modern OSes may intercept it with a security/Task Manager dialog, but the underlying intention remains tied to the warm-boot concept.

Why Other Options Are Wrong:
Ctrl+ESC (Option A) typically opens a Start menu or shell function; it does not reboot.Ctrl+Shift+Del (Option C) and Ctrl+Shift+Enter (Option D) are not defined as universal warm-boot triggers.Option E is incorrect because there is a well-known combination.

Common Pitfalls:

• Confusing OS-level actions (like opening Task Manager) with firmware-level warm boot.
• Assuming behavior is identical on all modern systems where OS security may intercept the sequence.

Final Answer:
Ctrl+Alt+DEL