Many thanks. I'll check from DELL. In fact, my friend gave the laptop to me recently, since I want a PC to run windows 98. I found it runs on windows 98SE, but I only have windows 98, so I wonder if I reinstall it by windows 98 is the USB port still work? BUT... actually....I cannot found any device that connected to the USB port can work properly, even I had downloaded some drivers for the devices ....