Wireless Security Alarm

I have a laptop that just won’t change the NETWORK KEY. My pc my other laptop changes but the third laptop computer refuses to change. I have unistalled the network card and USB wireless driver put in the changed network key and soon as i hit ok it defaults back to the old default. I have even selected manual install but still goes back to it’s old ways. What is going on there must be something i am missing ?Is there an alternative to changing my router security? Can i use zone alarm to prevent people piggy backing onto my cable? I am using XP OS

I want to buy 2 IP Surveillance cameras for my home. I want it to be wireless connection(meaning no cable running from the camera to the router) and it has to be wall mounted. Does anybody have any experience with using these, if so what brands do you recommend.

Ok i have DSL…and the ip address changes everytime…It is also on wireless so i use 192.168.1.x! i have a security DVR and its IP is 198.162.1.X…how do i set up a Static IP address using netopia router? and when i do set up it …lets say im at home what IP do i type in webaddress to access the DVR login? please help me