I have a windows XP SP2 computer, and my firewall is Windows firewall. I can’t update any virus definitions neither automatically, nor manually. I’m not sure what I’m doing wrong, or how to fix it. I’ve read many posts on this subject in this forum, but maybe because most people had Comodo firewall (whatever that is) the solutions are not working for me.
Please help.
Never mind, I’ve just fixed my own problem. Thanks anyways…
And what did you do? 
If you wrote the solution about your problem, we all can help others, that maybe will have the same problem in the future.
If you can say what was the cause and what you did it might help others in the future, and it would neatly close the topic.
Welcome to the forums.