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The Base Filtering Engine (BFE) service is an important network component thatвЂ™s targeted by many malware. If the BFE service doesnвЂ™t start, many services such as Windows Firewall, Routing and Remote Access and other services fail to start.
Should the BFE service be missing from the Services MMC, or if the Action Center warns you that the Windows Firewall isnвЂ™t enabled, then itвЂ™s highly likely that your system is under attack. Have it checked thoroughly using a reputed anti-malware tool or you may seek professional help to eliminate malware. Trying to repair these services when a malware is on-board your system, isnвЂ™t going to help in most cases.
This post assumes that youвЂ™ve done a malware cleanup, and looking for information on how to fix the services such as BFE, Windows Firewall and others.
First (and probably the only) thing most of us do to reinstate the Base Filtering Engine Service is to import the service registry keys from a similar computer, which is actually a correct step. But this only enlists the service in the Services MMC, but the required service Permissions arenвЂ™t assigned automatically. Due to missing special permissions for the BFE service, the following errors occur when you try to turn on the BFE or Windows Firewall.
Some of the error messages you may see:
Action Center canвЂ™t turn on Windows Firewall
Turning it on via Windows Firewall control panel, may show up error Windows Firewall canвЂ™t change some of your settings. Error code 0x80070433 or Error 0x8007042c.
Services MMC: Windows could not start the Windows Firewall service on Local Computer. Error 1075: The dependency service does not exist or has been marked for deletion.
Services MMC: Windows could not start the Base Filtering Engine service on Local Computer. Error 5: Access is denied.
This is recorded in the System event log as well:
Log Name: System
Source: Service Control Manager
Date: 1/9/2016 8:21:25 AM
Event ID: 7023
Task Category: None
The BFE service terminated with the following error:
Access is denied.
Resolution: Fix the BFE Service Registry Keys
First, create a System Restore point, and then restore the BFE service registry entries by downloading the appropriate .zip for your version of Windows:
Unzip and run the enclosed REG file. This registers the BFE service back.
CanвЂ™t access the BFE Registry key? Take Ownership.
If you arenвЂ™t able to open the BFE service registry key, or unable to change the Permissions as suggested in this article, then you may need to take ownership of the following registry key:
and (only if necessary), in this key: report this ad
For more information of changing ownership of a registry key, see article Take ownership of a registry key. Once done, it should be fairly easy to apply the correct permissions for the Base Filtering Service registry key.
Then, to fix the BFE service permissions, start Regedit.exe and go to the following registry path:
Right-click Policy, and click Permissions
It has some default permissions, inherited from the parent key. By default, SYSTEM and Administrators group have Full Control permissions. But this isnвЂ™t enough to start BFE.
Click the Add button.
In the Enter the object names to select: box, type NT SERVICEBFE, and click OK.
BFE is added to the list of Group or user names. We need to give it some special permissions. Click Advanced
Select BFE, and click the Edit button.
In the Permission Entry dialog, enable or Allow the following Permissions for BFE:
- Query Value
- Set Value
- Create Subkey
- Enumerate Subkeys
- Read Control (this is added by default when you added BFE)
After adding the above (six) Permissions, click OK.
YouвЂ™ll be back at the Advanced Security Settings dialog now. Select BFE, and click the Replace all child object permissions with inheritable permissions from this object, and click OK.
youвЂ™ll be back at the standard permissions dialog. Simply click OK and close the dialog.
Restart Windows, and then launch Services MMC. To do so, click Start, type services.msc and hit
Still no dice. Fix the Security Descriptors
If all else fails, resetting the BFE service Security Descriptors might do the trick for you. Open a elevated/administrator Command Prompt. To do so, type cmd.exe in Start. From the search results, right-click Command Prompt, and choose Run as Administrator. In the console window, type in the following command:
Make sure that there are no spaces in the Security Descriptor string. It should be like:
Note: The BFE service default Security Descriptor is same for Windows 7, Windows 8 and Windows 10. Applying the above Security Descriptor for any other Windows Operating System isnвЂ™t suggested.
(For some background information on service Security Descriptors, read the posts by Richard Spitz and Microsoft Enterprise Networking Team TechNet Blogs).
And you should see the message SetServiceObjectSecurity SUCCESS. Restart Windows once again. Instead, if you get the error SetServiceObjectSecurity FAILED 5: Access is denied, then Permissions are wrong somewhere, in which case, re-run all the steps above to verify the Permission entries. It should work eventually!
When installing Avast Antivirus, you may receive an error message ‘The Base Filtering Engine (BFE) is not running‘, and Avast Setup wizard is unable to complete the installation until the Windows BFE service is restored and running.
The BFE service controls the operation of the Windows Filtering Platform. This service is essential for the operation of many firewall products, including the Firewall embedded in Avast Antivirus.
This issue may be a result of active malware which has disabled, terminated, or removed the Windows BFE service to prevent detection. It may also result from changes made to your system files or registry from a PC tune up software.
To resolve this problem, you need to restore and start the BFE service.
Ensure that the Windows Base Filtering Engine service is running by following these steps:
- Simultaneously press the Win and R keys on your keyboard to run the Windows Services console, then type services.msc in the field and click OK. The Services console appears.
- Locate Base Filtering Engine in the Windows Services console, and check the Status column. The status needs to display the text Running before you can continue installing Avast. If the status is blank, it means the service is not running.
- Right-click Base Filtering Engine in the list and select Start to enable the BFE service. If the BFE service does not start, select a method below and use the instructions in the relevant article:
- Repair the BFE Service by using Windows Firewall Diagnostics:
- Automatically diagnose and fix problems with Windows Firewall
- Remove malware that may be blocking the BFE service by using Avast Rescue Disk:
- Creating and using Rescue Disk in Avast Antivirus
- Go back to the Avast Antivirus setup and click Retry to continue the installation or use the following links to install Avast Antivirus from the beginning:
- Latest versions of Avast Antivirus:
- Avast Premium Security (previously Avast Premier) | Avast Free Antivirus | Avast Omni
- Older versions of Avast Antivirus:
- Avast Internet Security | Avast Pro Antivirus
When you have successfully installed Avast on your PC, it is recommended to use these additional steps:
- Run a Boot-time Scan to check for any malware that may try to disable the BFE service again. For more details, read the following article:
- Running a Boot-time Scan in Avast Antivirus
- Cons >
- Avast Premium Security 19.x
- Avast Free Antivirus 19.x
- Avast Omni 1.x
- Avast Premier 19.x
- Avast Internet Security 19.x
- Avast Pro Antivirus 19.x
- Microsoft Windows 10 Home / Pro / Enterprise / Education — 32 / 64-bit
- Microsoft Windows 8.1 / Pro / Enterprise — 32 / 64-bit
- Microsoft Windows 8 / Pro / Enterprise — 32 / 64-bit
- Microsoft Windows 7 Home Basic / Home Premium / Professional / Enterprise / Ultimate — Service Pack 1, 32 / 64-bit