Quick Fix/Troubleshooting: Blue Screen - IRQ_NOT_LESS_OR_EQUAL Error on Lenovo Laptop

in STEMGeeks2 years ago

Here's how to fix it

  1. Turn-off laptop.
  2. Turn-on laptop, when the screen turns on press "F2" or "Fn + F2" on the keyboard to access the BIOS/UEFI.
  3. Go to "Exit".
  4. Select "OS Optimized Defaults".
  5. Select "Win8 64bit".
  6. Save your changes then restart the laptop.
  7. Done.


Tested on

  • Lenovo IdeaPad S410p laptop
  • Windows 8.1 Pro


  • Seconds after turning on the laptop (after the desktop loads) it shows a blue screen with IRQ_NOT_LESS_OR_EQUAL error description.

Cause of the error

  • Error started after reformatting the laptop (from Windows 8 to Windoss 8.1)


Most of the time (if not always) IRQ_NOT_LESS_OR_EQUAL is invoked by a driver error.

It is probably because the laptop's OS is upgraded from Windows 8 Home to Windows 8.1 Pro.

Sometimes it is caused by a corrupted driver.

Luckily, changing the setting on the BIOS/UEFI fixes the error.

If this fix doesn't work for you

Try to return the laptop's OS to its original OS which is Windows 8 Home.

Some words from the author

Most of the troubleshooting tips that I am sharing on this platform are based on my work experiences.

There is no "fix all" solution (some solution may not work with other devices).

I am an I.T. professional (Computer Engineer) working in a private company, a blogger, a father, and a husband.