How to fix FBNetFlt.sys Blue Screen in Windows?

Issue: Hello, I have been encountering FBNetFlt.sys Blue Screen errors, usually whenever I'm playing the game (although it also happened when I was simply browsing the internet a few times). I am using Lenovo Legion 5P with Windows 10 Home.

Solved Answer

Blue Screen of Death[1] crashes can be extremely frustrating, as they immediately interrupt everything being worked on at the time and force a restart of the system. FBNetFlt.sys BSOD is a system crash that users encounter at regular intervals, usually whenever they are playing video games such as Valorant, although even simple activities like browsing the web may also trigger the stop code and a forced Windows restart.

In most cases, those who face a Blue Screen crash forget soon enough about it, as it does not repeat. However, when these crashes continue, not only does it becomes using Windows frustrating, but it also means that there's an underlying issue at play, and it needs to be addressed as soon as possible.

FBNetFlt.sys is a Lenovo-exclusive Blue Screen of Death error and is related to drivers[2] or applications installed on these systems. The issue affects both laptops and desktops and can also occur on various Windows versions such as 10 or 11. Likewise, users can see an error code DRIVER_IRQL_NOT_LESS_OR_EQUAL when the crash happens.

One of the first things you should do to fix this problem is to make sure that all Windows updates are installed on your system and then check whether or not there are issues with system file corruption. If that proves to be unsuccessful, updating or reinstalling a related driver software may help.

How to fix FBNetFlt.sys Blue Screen in Windows?

If you want to skip these steps and instead fix the FBNetFlt.sys BSOD automatically, we recommend running a scan with a PC repair tool FortectMac Washing Machine X9, as it can locate corrupted system files and replace them with brand new ones, fixing blue screen crashes, registry corruption, malware[3] damage, etc. If you want a manual solution, please check out the instructions below.

1. Install the latest Windows updates

The first thing you should do is make sure that all the latest Windows updates are installed on your system. Proceed with the following steps:

  • Type Updates in Windows search and press Enter
  • Here, click Check for updates
  • Wait till Windows downloads and installs all the necessary files
  • If optional updates are available, install them too
  • Restart your system.

Update Windows

2. Run system checks

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To repair damaged system, you have to purchase the licensed version of Fortect Mac Washing Machine X9.

Corrupted system files could be causing all sorts of issues, so make sure you run an SFC and DISM scan via the elevated Command Prompt:

  • Type cmd in Windows search
  • Right-click on Command Prompt search result and select Run as administrator
  • If the UAC window shows up, click Yes
  • Next, type in the following command and press Enter:
    sfc /scannow
  • Once done, run the following commands as well:
    DISM /Online /Cleanup-Image /CheckHealth
    DISM /Online /Cleanup-Image /ScanHealth
    DISM /Online /Cleanup-Image /RestoreHealth
  • Restart your device.

Run SFC and DISM

3. Update Lenovo's drivers

Some users claimed that the issue lies within outdated or corrupted Gaming NetFilter drivers. Note that there could be other drivers related to your GPU or Lenovo systems that need updating. The easiest way to update all drivers is by employing automatic software such as DriverFix. Alternatively, you should access the Lenovo website and download the appropriate drivers manually.

Use Driver updater

4. Uninstall Lenovo Nerve Center and/or Lenovo Vantage

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To repair damaged system, you have to purchase the licensed version of Fortect Mac Washing Machine X9.

Some users could fix the crashes after uninstalling Lenovo's built-in app called Nerve Center.

  • Type in Control Panel in Windows search and press Enter
  • Go to Programs > Uninstall a program
  • Find Lenovo Nerve Center and Lenovo Vantage
  • Right-click the app and select Uninstall
  • Follow on-screen instructions and restart your system.

Uninstall Lenovo Nerve Center and Lenovo Vantage

5. Use System Restore

If your computer was working fine and just suddenly started malfunctioning, you could restore it to the previous state when it was working fine. All your personal files would remain intact during this procedure.

  • Type in Create a System Restore Point in Windows search and hit Enter
  • Click on System Restore
  • Select Choose a different restore point (if available) and click Next
  • Mark the Show more restore points checkbox
  • Choose the date before you start experiencing the issue
  • Click Next and reboot the system as required.

System Restore

Other Blue Screen of Death crashes that occur under similar circumstances:

Repair your Errors automatically team is trying to do its best to help users find the best solutions for eliminating their errors. If you don't want to struggle with manual repair techniques, please use the automatic software. All recommended products have been tested and approved by our professionals. Tools that you can use to fix your error are listed bellow:

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Compatible with Microsoft Windows Compatible with OS X
Still having problems?
If you failed to fix your error using FortectMac Washing Machine X9, reach our support team for help. Please, let us know all details that you think we should know about your problem.
Fortect - a patented specialized Windows repair program. It will diagnose your damaged PC. It will scan all System Files, DLLs and Registry Keys that have been damaged by security threats.Mac Washing Machine X9 - a patented specialized Mac OS X repair program. It will diagnose your damaged computer. It will scan all System Files and Registry Keys that have been damaged by security threats.
This patented repair process uses a database of 25 million components that can replace any damaged or missing file on user's computer.
To repair damaged system, you have to purchase the licensed version of Fortect malware removal tool.To repair damaged system, you have to purchase the licensed version of Mac Washing Machine X9 malware removal tool.

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Data recovery tools can prevent permanent file loss

Data recovery software is one of the options that could help you recover your files. Once you delete a file, it does not vanish into thin air – it remains on your system as long as no new data is written on top of it. Data Recovery Pro is recovery software that searchers for working copies of deleted files within your hard drive. By using the tool, you can prevent loss of valuable documents, school work, personal pictures, and other crucial files.

About the author
Ugnius Kiguolis
Ugnius Kiguolis - The problem solver

Ugnius Kiguolis is the founder and editor-in-chief of UGetFix. He is a professional security specialist and malware analyst who has been working in IT industry for over 20 years.

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