UPDATE:
Better command is this
REG DELETE HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Security /f
REG DELETE HKLM\SOFTWARE\Classes\AppID\{ce166e40-1e72-45b9-94c9-3b2050e8f180} /f
Stick that in a batch file and run it. It appears to fix the issue totally then. Also referenced on the MS link below.
END UPDATE
You attempt to start the Firewall in control panel and get this.
Then this
Run a CMD as admin and type or paste this into it
SC sdset SharedAccess D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
Then you should see this and it should say, as does here, SUCCESS if it’s worked. Normally fails if you don’t run the CMD as admin
More info on this here