After inserting the USB flash drive into the computer in Win7, you can't use it again.

Insert the USB flash drive into the computer in Win7. The system usually recognizes and uses it correctly, but if you right click on the U disk icon in the taskbar, select Exit. U disk, and then insert the U disk again, the system is not recognized, in order to solve this problem, you can restart the system, if you do not want to restart the system can also be corrected as follows: [Solution]: Enter the Win7 system desktop, right click "ld" "Computer", select "Properties", in the pop-up properties window, click the "Device Manager" in the upper left corner, and then pop up "Device Manager" window, click to expand "Universal Serial Bus Control" & rdquo;, there are many rows of "USB Root Hub" device list (Figure 2), right-click each "USB Root Hub", select "ld"; disable & rdquo; menu, and then enable it, so for each & ldquo ; USB Root Hub” all this way, you can use the U disk again without restarting later!