In the life of a Windows user, few sights are as jarring—or as cryptic—as the Blue Screen of Death (BSOD). The screen flashes, the system reboots, and a vague error code like DRIVER_IRQL_NOT_LESS_OR_EQUAL stares back at you. You are left with a sinking feeling and a single question: Why?

The most powerful—and famously intimidating—minidump viewer is (Windows Debugger) from Microsoft. When you load a minidump into WinDbg, a seemingly magical transformation occurs. With a single command— !analyze -v —the tool churns through the binary soup and outputs a diagnosis.

When the screen goes blue, don't rage. Reboot. Then, open your minidump viewer. The truth is waiting in that tiny .dmp file.