USB tips to make your computer more secure

1. First determine the drive letter, you can put your own USB stick, and then you can see the drive letter, this step is very important, if the letter is wrong, then let your computer to sleep it;

2. Create a file in the USB drive, the file name and extension are arbitrary input, such as the file created here is 123.LJ;

3. Create a batch file on your local disk (save As. bat with Notepad) with the following line of statements:

Ifnotexisti:123.ljshutdown-s-t10-c "You cannot use this computer"

Here I is the USB drive letter, which means that if there is no 123.lj file in the USB stick, the computer will be shut down after 10 seconds and the message "You cannot use this computer" is displayed.

4. In the run, enter "Gpedit.msc" to open the Group Policy, and navigate to the following path: "Local computer" policy → computer machine configuration →windows settings → script (startup/shutdown), and then select "Startup" in the box to the right and add the batch file you just created to the startup script list , OK and quit on it.

When you're done, you can only plug in the USB flash drive to start your computer and enter the system, or you'll see the following prompt and turn off your computer within a specified time:

Also, say the solution in case of lost USB.

1. If the time is enough, you can enter "Shutdown-a" in the operation to remove the shutdown instruction;

2. You can also boot the computer into Safe mode to remove the startup script because the boot script is not loaded in Safe mode