Win7 system can not identify the u disk u disk caused by the failure of the boot disk production and solutions

        Cause 1. The u disk may be occupied or occupied by third-party software. The occupied u disk will cause the U disk boot disk creation tool to fail to be created, or the U disk boot disk creation tool will not recognize it at all, and the computer does not recognize it. The existence of the U disk is displayed;
Solution: First press and hold the ctrl+alt+del combination shortcut to open the task manager, then find some non-system processes, right click the mouse to query the file location, if there is a path for the u disk You can right-click to select the end task, remove the u disk occupation problem, and restore the U disk boot disk creation tool identification.
Cause 2, usb drive damage caused by usb inserted into the usb interface, when the time is good or bad, sometimes in the lower right corner of the "unrecognized usb device" words, the same open U disk boot disk production tool will appear Identify the fault.
Solution: First open the computer interface → right-click properties → device manager, in the open device manager interface, in the universal serial bus controller will uninstall all usb connections, then use the driver tools such as driver wizard software Reinstallation can solve the problem that usb cannot be recognized and the u disk boot disk creation tool fails.