Many people know mobile phones can turn hot, but they don't know computers can turn hot. The system is self-contained, but it is not, but can be activated by running the cmd command. Two conditions are required for the opening of a hot spot: one, a wireless card, and a launch function. The laptop is usually self-contained. There's usually no desktop. You can buy one."Usb wireless net card”extra/inline antenna, several to dozens of dollars. 2. Computer networks are normal, otherwise they will not be useful. The manual commands are attached to the software, and if you do not want to use the software, you can manually copy those commands to open them. Software run interface: