USB disk to make Windows boot encryption Dog Tutorial

U disk and other mobile devices can be used to store files, install the system, but also can be used to make cryptographic dogs. This article refers to the encrypting dog that only pointers to the Windows system boot up the dog. Its role is to avoid others casually open their own computer to view their own private information, in addition to setting personal password, but also through a simple setting so that the computer can only be inserted into their own U disk can start, or after the start of the automatic shutdown.

Making such an encrypted dog doesn't have to be a complicated process, nor is it as basic as what a friend thinks it should be. Follow these steps and anyone can make an encrypted dog of his own within a minute.

1. Plug in your own USB drive or other Removable storage device

2. On the U disk to create an arbitrary type of file, the file name is arbitrary. I am here for the convenience of the explanation, using a blank text file, named "Encryption", the file name extension is ". txt". The file is placed in the root directory of U disk, U disk drive letter J:

3. Create a new text file anywhere on your computer, and enter the following in this text file

If not exist J: encrypted. txt shutdown-s-t 10-c "You cannot use this computer"

If there is no encrypted. txt file in the U disk, shut down the computer after 10 seconds and display the message "You cannot use the computer".

10 of the statements can be modified to other, such as 100, the prompt "You can not use the computer" can also be changed to other statements. As long as you do not change the format of the entire statement.

When the input is complete, save the text file as a second name, and the file extension is. bat. In the Save dialog box, select Save type as all files, so enter the extension ". bat" manually after the filename. This name is 26.bat.

4. Click "Run" on the Windows Start menu, where it is located on the right side of the "All Programs". You can see it by opening the Start menu.

Enter Gpedit.msc in the Open box and click OK to open the Group Policy dialog box. Navigate to the following path by clicking the mouse: "Local Computer policy → computer Configuration →windows settings → script (boot/shutdown), then select the" Startup "item in the box on the right, and add the batch file that you just created to the list of startup scripts, OK and exit.

Here you add the 26.bat batch file that was made earlier.

Here is the end, at this time, only when the boot to insert a U disk to start the computer and enter the system, or you will be prompted and shut down the computer within a specified period of time. Need to remind here must be in the display of Windows Start screen and then insert the production of the encryption dog, in the boot before the plug, it may cause some computers can not start the normal situation.

U disk lost case Solution:

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

2, back up your U disk files to other places, when the U disk is lost will you make encrypted txt to copy to the new U disk generally OK. If not OK please check the current U disk partition is the same as the original U disk.

3. Booting the computer into Safe mode deletes the startup script because the boot script is not loaded in safe mode.

If you're just trying to play with a friend, you can remove the startup script from Group Policy after you succeed. This relieves the use of the cryptographic dog.