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

Cause 1, u disk may be occupied or occupied by third-party software, the occupied u disk will cause the U disk boot disk The production tool failed to be created, or the U disk boot disk creation tool did not recognize it at all, and the computer actually showed the existence of the U disk;

Solution: first press and hold ctrl+alt+del combination shortcut Open the task manager, and then find some non-system processes, right mouse button to query the file location, if there is a path to the u disk, you can right click to select the end task, remove the u disk occupation problem, restore the U disk boot disk creation tool identification.

Cause 2, usb drive damage caused by usb plugged 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 A recognized fault will occur.

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 The driver wizard software reinstallation can solve the problem that usb can't recognize and make the u disk boot disk creation tool fail.