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Windows Firewall, Invalid Data problem
Boggin:
Just to check that your account isn't corrupt, can you open a Command Prompt (Admin) and enter this cmd which will activate the hidden Admin account to see if the Firewall works in that mode.
You will need to reboot then click on the Admin icon.
net user administrator /active:yes
When done, turn off the Admin account by repeating that cmd but change yes to no and reboot.
Boggin:
Test Reply.
emmrecs:
With apologies for the long delay in replying but I think I may have "accidentally" resolved the issue!
I tried the various steps outlined in the previous post, all without success.
In the meantime, I found a printed copy of something I had clearly downloaded a number of years ago from another forum (somewhere), which suggested that using Regedit and navigating to "HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy" and then deleting ALL the folders inside "FirewallPolicy", though not the FirewallPolicy folder, and then attempting to restart the firewall would resolve the problem.
For me it was a partial success since the system now threw a DCOM error, which seemed to somehow also involve something preventing me signing into my M$ Office account, via Word etc, on my computer.
Researching this led me to https://www.virtualizationhowto.com/2019/08/easy-fix-for-dcom-permissions-errors-with-powershell/ which, having read very carefully and downloaded the linked script (and having used the dcomcnfg facility to find the actual application ID of the Office Licence server) I was able to run the script and bingo! The Windows Defender Firewall is now reported by Services as "Running" (no errors in the Event log) and I can sign in to my Office account! And I have been able to reinstall the Microsoft Store; the loss of access to this is what was originally the catalyst for my attempts to resolve the firewall problem.
Thanks again to all those who offered help.
Jeff
Boggin:
Glad to see that you were able to sort it.
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