Computer Tricks and Secrets

Short answer: you can hide a file inside an ordinary JPG image on Windows with a one-line Command Prompt trick: zip your files, then combine the image and the ZIP into a single picture that opens normally but secretly contains your data. It is a fun, classic trick, but it is concealment, not encryption. Here is how it works and its limits. How to do it Put the files you want to hide into a ZIP archive (e.g. secret.zip). Pick a cover image, e.g. photo.jpg. Put both in the same folder. Open Command Prompt in that folder and run: copy /b photo.jpg + secret.zip output.jpg The output.jpg opens and displays as a normal image, but the ZIP is tucked inside it. How to open the hidden files Change the file extension of output.jpg to .zip, or open it directly with a ZIP tool like 7-Zip . 7-Zip (right-click > Open archive) reads the hidden ZIP straight from the .jpg, no renaming needed. Your hidden files are inside, extract them as normal. Why it works The copy /b comman...

Short answer: you can make your screen fill with the green Matrix falling-code effect using a four-line Windows batch file, no software needed. Paste the code into Notepad, save it as a .bat, and run it. Here is the code, how it works, ways to customize it, and how to stop it, all completely harmless. The Matrix batch code Open Notepad . Paste this exactly: @echo off color 02 :tricks echo %random%%random%%random%%random%%random%%random%%random% goto tricks Save it as Matrix.bat (choose "All files" as the type so it does not save as .txt). Double-click the file. Your command window fills with scrolling green numbers. How it works @echo off hides the command prompt text so only the output shows. color 02 sets the window to black background, green text, the Matrix look. :tricks is a label, and goto tricks loops back to it forever. echo %random%... prints random numbers each loop, creating the falling stream. Customize it Change How Different col...

Short answer: you can make an "undeletable" folder in Windows by naming it with a reserved system name (like CON, PRN, or AUX) via Command Prompt, Windows refuses to delete or rename it normally. It is a fun trick, and here is exactly how to create one AND how to remove it again (the important part people forget). Why some names are undeletable Windows reserves certain names (CON, PRN, AUX, NUL, COM1-9, LPT1-9) for legacy devices. File Explorer will not let you create or delete a folder with these names, so a folder made this way via the command line resists normal deletion and renaming, which is what makes the trick work. How to create one Open Command Prompt . Navigate to where you want it (e.g. cd C:\Users\YourName\Desktop ). Create the folder using the special syntax: md CON\ (The trailing backslash and the reserved name are what let it be created.) You now have a folder named CON that Explorer cannot delete normally. How to remove it (do not skip this) S...