(Tips: After setting the login user name and password, a file named logon.dln will be generated in the root directory of the USB flash drive. This file cannot be deleted! Otherwise, even if you plug in a USB flash drive next time, you will not be able to enter the system because the system cannot read the "fingerprint"! At this point, all related settings have been completed, and now your U disk is now a key disk. It is basically impossible to enter the system without connecting the USB flash drive; and in the middle of the system use, if the USB flash drive is removed, the system will automatically confirm it - clicking "Unlock" in the dialog box is also invalid, unless the USB flash drive is connected to the in the computer. Now the software only supports Windows2000/XP/2003 system.)