K...my friends firewall isn't working and i cant figure it out. He has had alot of issues with it in the past but is now running smother than it had before, however he can not turn on the windows firewall (also his PC wont show up on networks). I myself have tried everything i can think of. He is logged on as the administrator and has no other firewall running to prevent the windows firewall from working. If you try to turn on the firewall it asks something about turning on something, when you click yes there is an error message. i know im not 100% specific but this is a last second post and im sure its happened before so you might know what im talking about. so i will be posting the error message and any other info you need as soon as i can. i have access to the laptop so i will be able to fix it for him. please help. Also the computer is running XP SP3.