Issue: How to fix FBNetFlt.sys Blue Screen in Windows?
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.
Blue Screen of Death 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 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.
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 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.
2. Run system checks
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:
- 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.
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.
4. Uninstall Lenovo Nerve Center and/or Lenovo Vantage
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.
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.
Other Blue Screen of Death crashes that occur under similar circumstances:
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