IRQL_NOT_LESS_OR_EQUAL — the blue screen, explained and fixed

Drivers do some of their work at raised “interrupt levels” where the rules are strict: certain memory is off-limits. This stop code (0x0000000A) means a driver broke that rule. Translation for humans: a driver is buggy, corrupted, or mismatched with this Windows version — and the fix is finding and replacing it.

The fix, in order

  1. Think about what changed. This code very often starts right after a driver install or Windows update. Roll back that driver: Device Manager → device → Properties → Driver → Roll Back.
  2. Update the usual suspects from the makers’ sites: graphics, network/Wi-Fi, and chipset drivers first. Avoid driver-updater apps.
  3. Run the file repairs: DISM /Online /Cleanup-Image /RestoreHealth then sfc /scannow from an admin prompt.
  4. Test the RAM with Windows Memory Diagnostic — bad memory can mimic a driver bug by corrupting what drivers read.
  5. Boot Safe Mode and remove recently added utility software (antivirus, VPN filters, hardware-monitoring tools install drivers too).

If it still happens

The crash dump names the guilty driver: open the .dmp file in C:\Windows\Minidump with a viewer like BlueScreenView (from NirSoft) or WinDbg — the “caused by driver” line is your target. Uninstall or update exactly that one.

Common questions

Which driver is it? The screen doesn’t say. The blue screen rarely names it, but the dump file does. Minidump analysis points at the .sys file involved in most cases.

It started after a Windows update. Coincidence? Usually not — updates replace drivers. Roll back the most recently changed device driver, or uninstall the update from Settings → Windows Update → Update history.

Related errors

MEMORY_MANAGEMENT · SYSTEM_SERVICE_EXCEPTION · DPC_WATCHDOG_VIOLATION