How to Fix FBNetFlt.sys Blue Screen Error in Windows

If you are encountering an FBNetFlt.sys Blue Screen Error while booting up your device and doesn’t know what to do next, read this article till the end. In this post, we will discuss what is FBNetFlt.sys, what triggers this error code, and six working ways that might solve this problem. 

When you receive this BSOD error, it might come up with additional information – Driver_Irql_Not_Less_Or_Equal, Unexpected_Store_Exception, or some other info. Whatever the reason is in your case, have this problem resolved by applying the tweaks outlined below. 

Fix - FBNetFlt.sys Blue Screen Error

What is FBNetFlt.sys & When does it occur?

FBNetFlt.sys is a system file of Lenovo Vantage and it helps gamers play games on their PCs quite easily and smoothly. Some important aspects of having this tool running on your PC are as follows –

  • Update all game-related drivers
  • Run diagnostics
  • Request support from Game Building companies. 
  • Warning users if they are connected to risky WiFi networks
  • and many others

You must now know the importance of this tool. However, at times, it might become corrupted for no specific reason and start corrupting system files and folders. Since you are facing a blue-screen type error, you have no other choices except applying the below fixes. 

FBNetFlt.sys Blue Screen Error Solutions

Solving a blue screen error requires booting into the Safe Mode first. This is essential because you can’t apply any fix if you can’t get past this Blue Screen. So, boot into the Safe Mode with or without networking and follow these solutions.

1] Reinstall Lenovo Gaming NetFilter Driver

Several users reported solving this FBNetFlt.sys Blue Screen Error after they have removed this Gaming NetFilter from their systems. However, if it does serve specific purposes on your PC, you may try uninstalling and then reinstalling the related drivers. Boot into the Safe Mode first and follow these steps –

  • Press Win + X, and select Device Manager.
  • Click the View tab and select Show hidden devices.
  • Under your system drivers and tools, search for Lenovo Gaming NetFilter.
  • When found, right-click on it and select “Uninstall device“.
  • A pop-up window should appear next, hit Uninstall again to confirm deleting this driver.

After this driver is removed successfully from your system, restart your PC and check if the problem resolves this way. To reinstall this driver, visit Lenovo’s official site and download its driver. Double-click on the downloaded device driver to begin installing Lenovo Gaming NetFilter Driver. 

2] Uninstall Lenovo Vantage

If uninstalling and then reinstalling the gaming NetFilter doesn’t do anything, you must remove this software from your computer. To do so, follow these easy steps – 

  • Press Win + X, and select Installed apps. If you are on earlier versions of Windows, select Apps & Features instead of Installed apps.
  • On the upcoming window, come down to Lenovo Vantage and click the three dots available on its right end.
  • From the pop-up window, select Uninstall and then Uninstall again on the confirmation window.
  • Wait for the system to remove this application from your computer permanently. 

Reboot your device normally and check if the problem resolves after uninstalling Lenovo Vantage. 

3] Run SFC/DISM Scans

For Windows PC to run smoothly, all system files and folders must remain healthy and error-free. At any time, when the system files went missing or have been corrupted due to some malware, your device might get into a blue-screen type error. 

To address file corruption on Windows 11/10, you may use System File Checker. Here’s how to utilize the SFC scan on your computer –

  • Press Win + R to launch the Run dialog.
  • Type “CMD” and press Ctrl + Shift + Enter keys altogether.
  • Command Prompt will start next having administrative privileges. 
  • On the elevated console, type the following, and press Enter –

sfc /scannow

SFC Windows 11

  • Wait for this command to run successfully and see what CMD says in the end. 

Just like SFC, DISM is an in-built tool on Windows 11/10 that can find and solve any corruption inside the System Image. To initiate running the DISM command on Windows PC, do the following – 

  • Press Win + X and select Windows Terminal (Admin).
  • The terminal will default land into Windows PowerShell.
  • Type the following on it and press Enter – 

DISM /Online /Cleanup-Image /RestoreHealth

DISM Windows Terminal

  • This tool will also take 10-15 minutes to automatically find and resolve any corruption within your System Image. 

By the end, your device must be working fine. If not, follow the next set of solutions outlined below. 

4] Remove Latest Windows Updates

Microsoft releases new updates 1-2 times a month. Out of these, there is one security update while others are simply non-security, out-of-band, or other updates. These updates are optional in nature and one doesn’t require installing them unless the update is of any use to a particular user. 

In case you have installed such an update and this FBNetFlt.sys Blue Screen Error starts occurring afterward, you must have installed a buggy update. Get rid of this faulty update and your device will start running normally. Here’s how to perform this task on Windows 10. Windows 11 users may follow these steps instead – 

  • Launch Settings (Win + I), and navigate to the below path –

Windows Update > Update history

  • Scroll down to Related settings and click on Uninstall updates.

Uninstall updates on Windows 11

  • At the top, you will see all updates that were installed on your system recently.

Uninstall KB5017271

  • Click the Uninstall button available on an update’s right end. 
  • A confirmation window will pop up next, hit Uninstall again.

The system will immediately start removing the selected update from your device. Wait for this to complete and as soon as this is over, restart your PC. 

5] Use System Restore Point

If your system does have a restore point, use it and revert back your PC to an earlier state when everything was running perfectly. To do so, follow these easy steps –

  • Right-click on the Windows icon and select Run.
  • Type “rstrui” on it and hit OK.
  • When the System Restore window launches, click Next.
  • Select the recent restore point and hit Scan for affected programs.
  • Only when this check reports “None detected“, proceed with the restoration of your PC. 
  • Click Next and then Finish.

Your PC will restart and start reverting back to the chosen state. 

6] Clean Install Windows

I hope the FBNetFlt.sys Blue Screen error resolves by now. In case none of the above fixes resolve this BSOD error, you are left with only one option and that is clean installing windows 11/10. 

Soni Aryan

Soni Aryan

Soni Kumari is a tech enthusiast known for her expertise in how-to type topics and Windows troubleshooting articles. She loves exploring how to do things or tweaks in Android, iPhone, and other operating systems.