Error: 0x80320009 appears when you try to launch Windows Firewall

Applies to: Windows 7 EnterpriseWindows 7 Home BasicWindows 7 Home Premium


When you try to start Windows Firewall, you get one of the following error messages:

Windows could not start the Base Filtering Engine service on Local Computer. Error 0x80320009: An object with that GUID or LUID already exists.

To fix this problem, follow the instructions in the "Resolution" section.


Method 1: Fix the problem automatically

To fix the error automatically, click the Fix it button or link. Click Run in the File Download dialog box, and then follow the steps in the Fix it wizard.

Microsoft Fix it 9750292

Note this wizard may be in English only; however, the automatic fix also works for other language versions of Windows.

Note if you are not on the computer that has the problem, save the Fix it solution to a flash drive or a CD and then run it on the computer that has the problem.

Method 2: Run System File Checker (SFC)System File Checker (SFC) will scan all important Windows files and if there's an issue with any of them, it will fix them.

  1. Click the Start button, then type cmd in the Search box.
  2. Right click cmd.exe, then click Run as administrator.
  3. If prompted, click Yes.
  4. In the Command Prompt window, type sfc /scannow, then press Enter.
If the scan doesn't show any errors, go to method 2.

Method 3: Check to see if 3rd party firewalls are creating a conflict

Disable all 3rd party firewalls that are running at the same time as Windows Firewall. If after disabling the 3rd party firewall your Windows Firewall service starts normally, contact the firewall vendor for assistance. A list of anti-virus and firewall vendors can be found here:

If this hasn't fixed the error, go to method 3.

Method 4: Perform a System Restore

You can restore Windows back to a state before this error happens. If you have created previous restore points, follow the steps below. If you haven't created a restore point, skip to the next method.

Note: It is recommended you back up your files before doing a System Restore. For information on how to back up your files, click: Back up your files (Windows 7) or Back up your programs, system settings, and files (Windows Vista)
  1. Click the Start button, type System Restore in the Search box, and then click System Restore.
  2. Follow the onscreen instructions to perform the System Restore.
If this hasn't fixed the error, go to method 4.

Method 5: Perform an in-place upgrade

Note Performing a repair installation will not damage files and applications that are currently installed on your computer. Performing a repair installation will restore the current Windows installation to the version of the installation DVD. This also requires the installation of all updates that are not included on the installation DVD.
  1. Insert the Windows Vista, Windows Server 2008, Windows 7 or Windows Server 2008 R2 DVD in the computer's DVD drive.
  2. In the Setup window, click Install Now.
    1. Click the Start button, and then type Drive:\setup.exe in the Search box. Note The Drive placeholder is the drive letter of your computer's DVD drive.
    2. lick Setup.exe.
    3. In the Setup window, click Install Now.
  3. Click Go online to obtain the latest updates for installation (recommended).
  4. If prompted, type the CD key.
  5. Select the operating system in Install Windows page you want to Upgrade or Inplace.
  6. Click Yes to accept the Microsoft Software License Terms.
  7. On the Which type of installation do you want? screen, click Upgrade.
  8. When the installation is complete, restart your computer.

More Information

For information about in place upgrades, visit:

For more information about Windows Firewall, click:

To learn more about System restore, visit: