I have a Toshiba G20 laptop. It has Windows XP Media Center edition. I bought a new Huawei E160G usb dongle. The dongle has a sim card in it and it is activated. The net is working. But the laptop does not allow me to use it. I had installed it in the laptop. The software that came with dongle shows good signal strength but internet fails to work. I have a a much older HP laptop in which it is working. I had removed unwanted programs from the system but somehow it is still not working.