Drivers · critical

How to fixDRIVER_IRQL_NOT_LESS_OR_EQUAL

IRQL driver - incorrect level

What this error means

This critical-severity issue affects the system driver. The driver accessed memory at the wrong IRQL level. The most common type of BSOD. It sometimes comes down to corrupted INF file. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 4 complete
01Identify the faulty driver (.sys file) from the BSOD or minidump

Identify the faulty driver (.sys file) from the BSOD or minidump.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Update or reinstall the corresponding hardware driver

Update or reinstall the corresponding hardware driver.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Disable Driver Verifier if it was enabled

Disable Driver Verifier if it was enabled.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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04Run MemTest86 to verify memory stability

Run MemTest86 to verify memory stability.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Incompatible driver
  • Corrupted INF file
  • Network or GPU driver