I have a old Compaq nx9000 Laptop in my home.most of the time, i cant even detect my home network.i dont know what happen with tat. when i use cable, it can straight go online. once i want to use wireless build in. it is hardly to detect the wireless. while there is another laptop sit beside it can detect my home wireless network. can any1 help me with this solution? actually , i though is my wireless build in got problems, then i go and buy an external Belkin wireless USB. at first, it can works, but after few times. when i start my laptop. it come out the blue screen. i suspect the hardware itself got problems with my laptop. what should i do?