1. Open your command prompt Start–>Run and Type cmd

2. Type cd.. to move to C:\> drive or Type cd desktop to move to your desktop.

3. Type the code shown below in your command prompt
notepad filename.txt:hidden

eg:notepad ff.txt:hidden

4. Write some data and save(Ctrl+S) the file.

5. Browse to the file location and Open filename.txt
eg: ff.txt

you cannot see any data in the file.

6. To retrieve the hidden data open command prompt and type the same command.
notepad filename.txt:hidden

eg:notepad ff.txt:hidden

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