When the Machine Check Exception is the underlying cause, Windows may instead trigger on older systems, or Bug Check 0x124 (WHEA_UNCORRECTABLE_ERROR) on Windows Vista and later through the Windows Hardware Error Architecture (WHEA).

: The most common causes are failing processors, faulty RAM sticks, or failing motherboard components. Heat & Power

Dealing with MCEs involves both hardware and software troubleshooting steps:

This error, often presented as a red screen on servers (e.g., HPE ProLiant Gen10) or a fatal Windows crash, indicates a specific failure within the .

When a processor detects a fault that it cannot resolve via Error-Correcting Code (ECC) or internal hardware logic, it stops executing code to protect data integrity. The CPU writes information about the error to specific model-specific registers (MSRs), known as , and fires the 0x12 interrupt. What the CPU Logs During a 0x12 Exception