This was the third crash this week. The first had been a Blue Screen of Death— MEMORY_MANAGEMENT . She’d ignored it. The second was a sudden reboot while rendering a video. Now this: a total catatonic seizure of the machine that held her master’s thesis on astrophysical simulations.

Login screen. Her fingers trembled as she typed her PIN. Desktop loads. And then, rising from the system tray like a ghost from a grave, a notification from the Action Center:

She clicked.

Leo, now eating cereal directly from the box, leaned over. “Told you. Swap the sticks.”

A detailed report opened in Event Viewer: MemoryDiagnostics-Results → Error Count: 4 . Below, in the gory details: “The following memory locations contained errors: 0x000000012F4A8C10, 0x000000012F4A8C18...” Four distinct addresses, all within the same physical bank.

And sometimes, that was enough.