Error codes

0x0000007E

SYSTEM_THREAD_EXCEPTION_NOT_HANDLED

What it means

A system thread crashed and nothing handled the error. The named file is almost always a driver.

Common causes

• Graphics or chipset drivers
• Drivers left over from old hardware

How to fix it

1. Note the .sys file on the blue screen.
2. Open the crash dump in WhoCrashed or BlueScreenView: it usually names the driver file that caused it (for example nvlddmkm.sys is the NVIDIA driver).
3. If you cannot boot, open Safe Mode (hold Shift while clicking Restart > Troubleshoot > Startup Settings) and roll back the driver.
4. Update the graphics, chipset and network drivers from the maker's site (NVIDIA, AMD, Intel or your board vendor), not from a driver-updater tool.