If you buy genuine Meiping software, there are two situations: 1. Computer problems, computer system problems lead to the software can not run normally, computer U-port problems lead to the hardware can not be correctly identified (dongle). 2. There is something wrong with the dongle, so you need to call the dealer to replace it. So you can install software on other computers. If other computers can still work normally after installation, it is a computer problem. You only need to identify whether the computer system is faulty or the computer U-port is faulty. You can find out by connecting the USB flash drive. If the USB flash drive works normally, it is a system problem.