I U disk after plugging the lower right corner of the pop-up button to display the security
To manually assign your u a letter to see..First, right click on the desktop "computer", in order to choose the "management" and "storage" and "disk management", whether or not your disk. If there are right click your U disk select change drive letter and path, click below the "change" button, will pop up a window, and then click Assign the following driver number (A) "button on the right, select a drive, then" OK "on OK.
Look at the service system is not banned Smart card (smart card service), can not read the disk after the ban.
Right click my computer (XP) computer (win7) > > management of disk management, see if there is like a U disk capacity does not assign a drive letter, yes, right click on it and click change drive letter and path point add, select a drive can be determined.
