System files (.sys files) are important for the Windows operating system. If any one of them is corrupt or missing, the system might face issue. One such case is when the netwtw04.sys file is missing or corrupt. In such a situation, users would get the following error:
DRIVER IRQL NOT LESS OR EQUAL or SYSTEM THREAD EXCEPTION NOT HANDLED, Netwtw04.sys failed
SYSTEM_THREAD_EXCEPTION_NOT_HANDLED, Netwtw04.sys failed
The Netwtw04.sys file is used by Network components. It indicates an issue with the drivers.
The error could be causes by a virus or malware, newly installed programs, problem with drivers, etc.
1] Update Windows: The procedure to update Window in explained here.
2] Run a full anti-virus and anti-malware system scan.
3] Uninstall third-party anti-virus programs temporarily.
Try the following solutions to resolve the issue:
Solution 1] Roll-back the network driver
1] Press Win + R to open the Run window and type the command devmgmt.msc. Press Enter to open the Device Manager window.
2] Expand the list of Network Adapters and right-click on those mentioned as WAN miniport. Select Properties.
3] In the Driver tab, select Roll Back driver.
4] Click on OK to save the settings.
Solution 2] Update the network drivers
1] Open the Device Manager as explained in Solution 1.
2] Expand the list of network drivers. Right-click and update the network drivers.
Another suggestion is to update the drivers from Intel’s download center.
Solution 3] Run the DISM command and SFC scan
The Netwtw04.sys file could be re-added to the system through an SFC scan. The procedure for the same is mentioned here.
Solution 4] Run a CHKDSK scan
A CHKDSK scan helps in checking bad sectors in a hard drive and fixing them. Here’s the procedure for a CHKDSK scan.