The Windows Firewall service terminated with service-specific error 6801 (0x1A91)

in some circumstance it happen, that the windows firewall in your system can’t start and you have some trouble accessible the system remotely while everything looks ok, from local side.


Open a “run as administrator” command prompt.
Go to “c:\windows\system32\config\TxR”

  • run “attrib –H –S *” to make all hidden files in the directory visible.
  • run “del *.blf”
  • run “del *.regtrans-ms”
  • reboot the machine
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