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Author Topic: Win 10 Defender Firewall Won't Activate  (Read 193 times)


  • Kitizen
  • ****
  • Posts: 1081
Win 10 Defender Firewall Won't Activate
« on: February 21, 2021, 07:53:18 PM »

Further to my previous post today:,25639.msg430902.html#msg430902
Encountered another anomaly on one of my desktop PC's while performing full Win 10 Pro clean installs.
Win 10 Defender Firewall enable options were all "greyed out", could not be enabled.

Again, this was a known, documented anomaly with lots of suggested solutions on various web sites and in my case only occured on one of the PC's being re-loaded, a AMD Ryzen-5, Gigabyte MoBo desktop, did not occur on my Packard Bell, i5 desktop!

Only found one fix that worked.
Download and install Windows Repair Free utility:
Run repair routine, identified No. 6 - Repair Windows Firewall (see attached snapshot)
Advises running in Win Safe Mode which I did but may not be necessary for just one function.

All Win Defender Firewall options now became available and could be selected.
Zen 40/10 - DSLStats/RPi3B - ZyXEL VMG1312-B10A Modem/VMG-3925-B10B Router Huawei Cab


  • Kitizen
  • ****
  • Posts: 1155
  • TTB 80/20
Re: Win 10 Defender Firewall Won't Activate
« Reply #1 on: February 21, 2021, 08:53:48 PM »

Good find.
Tim & freenetname
Asus RT-AC68U and ZyXEL VMG1312-B10A Bridge on 80 Meg TTB Fibre