Just reporting in that automatic shutdown in Windows 7 64bit Ultimate is now working.

I of course put a tick in Allow in PrivateFirewall 7.0/ Process Monitor/Tixati (right cick) /Customize Rules/ and put a dot in initiate shutdown or logoff (OK), as I presume it wouldn't work without it!.

I also chose to delete Tixati settings on reboot when the PrivateFirewall 7.0 popup came up about a changed program and start again just to make sure.

Thanks guys.