IRQL_NOT_LESS_OR_EQUAL
IRQL_NOT_LESS_OR_EQUAL means one of two things: driver issues, or a bad Windows Service caused by a backup utility or antivirus scanner. This is a similar, but different error to the previous one we discussed, KMODE_EXCEPTION_NOT_HANDLED, so much of this guide will be familiar.Driver Issues
Sometimes the additional information on your Blue Screen will list the specific driver causing the problem, but this isn’t always the case.If it does list the driver, you’re going to want to disable it. If it doesn’t list it, read below.
Disabling a specific driver is tricky, but here’s how you do it.
Disable the Problem Driver
To track down the specific problem driver, you’ll need to run Driver Verifier, an application included with Windows.- Click Start
- Type verifier in the box and press Enter
- Select Create Standard Settings, then click Next, then select Automatically Select all Drivers Installed on this Computer
- Click Next, then Finish
- Reboot your computer, and you will see the list of drivers to be verified during startup. If there is a faulty driver you will get a BSOD with its respective error message You can then identify the driver listed and uninstall it when you log back into Windows
- When you have determined the faulty driver, log back into Windows and you can uninstall the driver via the Device Manager (see below) Next, you will want to disable the Driver Verification so it doesn’t always check on startup.
- Click Start and type verifier /reset
- Restart your PC in Safe Mode in order to avoid any further Blue Screens of Death while you’re trying to take care of the problem
- Click Start
- Click Control Panel
- Click Device Manager
- Click the arrow next to individual devices, right click on the device, and click Properties
- click Details to see the driver name. If you see any devices with a yellow exclamation mark, you’re on the right track, but this will not necessarily be the case
- Additionally, try doing a CTRL + F on the Windows desktop for the driver name to see what folder it’s in; this will provide a clue as to what device the driver belongs to
- Once you find the offending driver, click Uninstall from that same Properties screen
- Windows will attempt to reinstall the driver itself from information it provides from the Internet. This is called Plug and Play. Allow it to do so
- Run Driver Reviver to update the new driver to the most recent version