Home article search

Firewall is non-functional (9.x)


A new version has been released

A new version of ESET Windows home products have been released. We highly recommend that you upgrade to the latest version.

  • Remember: ESET Windows home products version 9 and later use a License Key for activation. What is a License Key?

  • You receive a "personal firewall is non-functional" error 
  • All Network Protection modules display a red protection status

Click the image to view larger in new window



Issue fixed in recent firewall module update

This issue was resolved in a recent Personal firewall module update. To update your Personal firewall module to the latest version, open your ESET product and click UpdateUpdate now. If your product is already up to date, proceed with the steps below.

  1. In most cases, you can perform a manual uninstallation and then reinstall ESET Smart Security to resolve this issue. Proceed to step 2 if this does not resolve the issue.
  2. Press the Windows Key  + R, type the command ncpa.cpl and then click OK to open the Network Connections dialog.
  3. Right-click the adapter that is currently in use and select Properties from the context menu.

Figure 1-1

  1. Check to see if ESET Personal Firewall is in the list. Take note of this and continue to step 5.

Figure 1-2

  1. Open ESET Smart Security.

  2. Press the F5 key to access Advanced setup.

  3. Expand Antivirus  HIPS and click the slider bar to disable HIPS. Click OK and then restart your computer.

Figure 1-3
Click the image to view larger in new window

  1. Open ESET Smart Security, click Setup  Network and check to see if the Network Protection modules are working properly. If they are, the issue is resolved. If the Network Protection status is still disabled, proceed with the following steps.

  2. Press the Windows Key  + R, type the command ncpa.cpl and then click OK to open the Network Connections dialog.

  3. Click Install, select Service and then click Add.

Figure 1-4
Click the image to view larger in new window

ESET Firewall service already listed

Select it and click Uninstall and then continue from step 10 above.

  1. Click Have Disk, navigate to the ESET Personal Firewall driver at C:\Program Files\ESET\ESET Smart Security\Drivers\epfwlwf and click OK

Figure 1-5
Click the image to view larger in new window

  1. Select ESET Personal Firewall and click OK.

Figure 1-6

  1. Repeat steps 6-7 and click the slider bar to enable HIPS. Restart your computer and check to see if the issue persists. 

If you are still unable to resolve your issue, please email ESET Technical Support.

Was this information helpful?