B, enter the BOOT (or startups) tab, press the up and down arrow keys to select and press the+or-key to move and confirm that the USB flash drive (USB-HDD, USB-FDD and other formats are acceptable, USB-HDD takes precedence) is set as the first startup item and press Enter to confirm (note: some computers need to insert a USB flash drive for identification before setting).
Some new motherboards support pressing F 12 or F 1 1 to enter the startup options menu. You can directly select a USB flash drive (the model of the USB flash drive is inserted in advance to identify), a universal flash drive or a removable device to start the computer without entering the CMOS interface.
Some old motherboards need to enter the advanced BIOS feature tab, enter it at "1st boot device", and then select USB-HDD.
C press F 10 to save, exit and restart. If the startup USB flash drive has been inserted before, it will automatically start from the USB flash drive and enter the function menu interface of the USB flash drive.
I. Basic concepts
U disk, full name of USB flash drive, English name of USB flash drive. It is a miniature high-capacity mobile storage product, which uses USB interface and does not need physical drive. Connect with computer through USB interface to realize plug and play. The name of USB flash drive comes from a new storage device produced by Netac Technology, which is called "USB flash drive" and is connected by USB interface. After the USB flash drive is connected to the USB interface of the computer, the data of the USB flash drive can be exchanged with the computer. Later, because Netac has registered a patent, the equipment with similar technology was renamed as "USB flash drive" instead of "USB flash drive". Later, the name U disk was widely known because it was simple and easy to remember, and it was one of the mobile storage devices.
Two. Normative composition
USB-related hardware and its equipment viewed from system attributes.
In the USB specification, it is divided into five parts, namely controller, controller driver, USB chip driver, USB device and client device driver for different devices.
Host controller: This is a physical chip, which is mainly responsible for executing the commands issued by the controller driver. At present, almost all controllers are integrated in the south bridge chip of the motherboard, and users do not need to buy them separately.
Host controller driver: establish communication link between USB and controller.
USB chip driver: provides support for USB.
USB device: USB peripheral devices connected to a PC, including USB hubs and devices. The former can be connected with other USB devices, and the latter is a specific device for completing specific functions.
Client driver: a driver used to drive USB devices, usually provided by USB device manufacturers or operating systems.