All fixes / Any game, Windows

Blue screen 0x139 KERNEL_SECURITY_CHECK_FAILURE while gaming

0x139 0x00000139 KERNEL_SECURITY_CHECK_FAILURE

Windows detected corrupted data inside the kernel. The usual suspects are unstable RAM settings or a bad driver, especially after a hardware change.

Why it happens

This bugcheck fires when an internal Windows data structure is damaged. Memory overclocks (XMP/EXPO), mixed RAM kits, and faulty drivers are the most common causes. It often appears right after new hardware is installed.

How to fix it

1. If you just changed hardware, undo the most recent change first and see if the blue screens stop.
2. Disable XMP/EXPO in the BIOS (or lower the memory speed one step) and test for a day.
3. Run a memory test such as TestMem5 or MemTest86. Any error means a RAM or memory-setting problem.
4. Update chipset and GPU drivers from the manufacturers' sites.
5. Open an admin Command Prompt and run 'sfc /scannow', then 'DISM /Online /Cleanup-Image /RestoreHealth'.

Still broken?

Open the minidump (C:\Windows\Minidump) with WinDbg or BlueScreenView to see which driver is named — or book a session and we'll read it together.