Windows Operating System
The platform firmware has corrupted memory across the previous system power transition. Please check for updated firmware for your system
This event is reported after detection of memory corruption by firmware after a power transition or sleep event.
Windows 7 and Windows Server 2008 R2 automatically checksum the contents of the lowest 1 MB of physical memory before and after a sleep transition. This checksum process enables
Windows to detect memory corruption and report any corruption as an error in the system event log.
If memory corruption occurs in the lowest 1 MB of physical memory during a sleep transition, the hardware application layer (HAL) logs event ID 12 in the Event Viewer.
The HAL logs the event after each sleep transition in which it detects memory corruption. The event data includes the number of physical memory pages corrupted, the first
physical page of corrupted memory, and the last physical page of corrupted memory.
Firmware Corruption of Memory During Sleep Transitions
How to troubleshoot Event ID 12 with source Microsoft-Windows-HAL