How to Fix DRIVER_IRQL_NOT_LESS_OR_EQUAL (Netwtw04.sys) BSOD on Windows?

by Ugnius Kiguolis - -


Issue: How to Fix DRIVER_IRQL_NOT_LESS_OR_EQUAL (Netwtw04.sys) BSOD on Windows?

I’m using a Dell laptop, which I have bought several months ago. Sadly, it has many problems already, so I’m afraid of its condition in the near future. The laptop not only frequently fails to play any sounds, but also displays a BSOD Driver_IRQL_NOT_LESS_OR_EQUAL (Netwtw04.sys). The error shows up under various occasions, but most frequently when I attempt to launch apps. I’m not a tech savvy person, so I don’t even imagine what should I do. Please provide me some fixes or I will have to return my PC to the manufacturer…

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Solved Answer

DRIVER_IRQL_NOT_LESS_OR_EQUAL is one of the Windows stop codes circulating on the Internet for a long time. Each case of this error is individual, which is why the file name provided next to the error differs. In this case, we will be discussing the Driver_IRQL_NOT_LESS_OR_EQUAL (Netwtw04.sys), but people can also encounter the mfewfpk.sys, ndis.sys, Epfwwfp.sys, netio.sys, kbdclass.sys, storahci.sys, and other errors.

The Netwtw04.sys BSOD shows up under various conditions, for example, while Windows is booting, while trying to launch apps or installing updates. The full Driver_IRQL_NOT_LESS_OR_EQUAL (Netwtw04.sys) BSOD says:

Your PC ran into a problem and needs to restart. We’re just collecting some error info, and then we’ll restart for you. (30% complete).
For more info about this issue and possible fixes, visit
If you call a support person, give them this info:
What failed: Netwtw04.sys

As the message states, system’s reboot may be enough to fix the BSOD. Unfortunately, none of the people who encountered this issue were lucky to fix it that easily. According to the latest reports, the culprit of the DRIVER_IRQL_NOT_LESS_OR_EQUAL (Netwtw04.sys) may be outdated or corrupted Intel Wireless Adapter driver. Besides, it’s advisable to check if the system does not contain two confronting anti-virus programs. Even though one of them may be disabled, certain files may be triggering software conflict resulting in the Netwtw04.sys error.

showing DRIVER_IRQL_NOT_LESS_OR_EQUAL (Netwtw04.sys) BSODUpdate Network Adapter Drivers

  • Click Win key + R, type devmgmt.msc, and press Enter.
  • OR right-click on Windows key and select Device Manager.
  • When the Device Manager opens, expand Network adapters section.
  • Right-click on you Network Adapter (Intel Network Adapter seems to be the culprit in this particular case) and select Update Driver Software.

If updating driver did not fix DRIVER_IRQL_NOT_LESS_OR_EQUAL (Netwtw04.sys) error, try to uninstall it completely and then reinstall it manually. For the purpose, repeat the same steps as provided above, except that instead of Update Driver Software select Uninstall. Then, while on the Device Manager, click on the Action tab and select Scan for Hardware Changes. The system should automatically detect the missing driver, but if for some reason the driver is not detected, navigate to the manufacturer's website and download it manually. Select the latest version and make sure that it's compatible with your OS.

Uninstall Alternate Anti-Virus Program

If you are running two different security tools on your PC, we would recommend removing the one that is currently disabled. It's files may be triggering software conflict, which is why some system drivers and other functions cannot function properly. You can uninstall it automatically using software like Perfect Uninstaller or manually via Control Panel.

NOTE: several people reported that the issue just started happening a few days after updating some system drivers. In this case, try reverting back the old driver versions

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