Are there any hidden firewalls?
Until yesterday everything worked just fine: no brickwall.
Sometimes , for some reason, the brickwall reappeared; so with Windows XP I used to restore the system to the previous day and everything worked normally again. What made that brickwall reappear I don't know.

Still yesterday that solution didn't work.

I disabled all my firewalls: windows firewall, my Trend Micro PCillin firewall, my router (Orange livebox firewall) so puzzled I was, but nothing doing LW was still behind a firewall!! So, what firewall could it be?

Because I need protection I turned on my antivirus firewall again, also my router's which is configured to allow LW anyway.

For months on end everything worked perfectly and suddenly, somewhere a firewall is running and I can't turn it off.