Windows Firewall with Advanced Security snap-in failed to load, Error 0x6D9

Some users accept reported that afterwards installing a safety software, they are unable to access the mesh as well as the Windows Firewall throws upwards an error. In such a situation, the Windows Firewall would survive turned off, as well as the organization would plow over an APIPA IP address. The exact fault message volition read:

There was an fault opening the Windows Firewall amongst Advanced Security snap-in, The Windows Firewall amongst Advanced Security snap-in failed to load, Restart the Windows Firewall service on the figurer that you lot are managing, Error 0x6D9.

Windows Firewall amongst Advanced Security snap-in failed to load

If you lot have such an fault message, apparently the kickoff footstep should survive to uninstall the safety software. However, that lone doesn’t contrary the harm thence you lot may accept to continue amongst the next solutions:

1] Perform a System Restore

After uninstalling the safety software, perform a System Restore as well as encounter if that resolves your problem.

2] Check the condition of these Windows Services

If the organization restore doesn’t help, banking concern gibe the condition of these 3 Windows Services:

1. Windows Firewall
2. Base Filtering Engine (BFE)
3. Windows Firewall Authorization Driver (MPSDRV)

Press Win+R to opened upwards the Run window as well as type the ascendence services.msc as well as hitting Enter to opened upwards the Services Manager. Check if these 3 services are Started.

Read: Windows Firewall service does non start.

3] Reset Windows Firewall

Resetting the Windows Firewall to default mightiness assistance resolve the issue. You tin produce it via the Control Panel, yesteryear using the built-in netsh utility or using our freeware FixWin.

Alternatively, you lot may execute the next commands inwards an elevated CMD i afterwards the other. They volition start the Services as well as re-register the firewall DLL file.

netsh advfirewall reset

net start mpsdrv

net start mpssvc

net start bfe

regsvr32 firewallapi.dll

If everything plant fine, it should in all likelihood cook the issue.

5] Run Windows Firewall Troubleshooter

You may run the Windows Firewall Troubleshooter as well as encounter if that plant for you.

6]  Reset the permissions for Microsoft Protection Service

Please backup the registry earlier you lot proceed.

The fault mentioned inwards the previous footstep volition locomote on if MpsSvc or Microsoft Protection Service lacks permissions at the registry level. The keys as well as permissions needed are equally follows:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Epoch

Permission needed: Query Value; Set Value

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Defaults\FirewallPolicy

Permission needed: Full Control; Read

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy

Permission needed: Full Control; Read

To add together the permissions produce the following:

1. Open the Registry Editor as well as browse to the mentioned registry keys as well as honor “Enter the object names to pick out field.”
2. Type “NT SERVICE\mpssvc” inwards the column. Next click “Check name” as well as and thence press OK.
3. Add appropriate permissions equally mentioned to the account.

All the best!

Source: https://www.thewindowsclub.com/

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