1. First, we right-click the mouse in the blank space of the computer desktop and select "Text Document" (you need to open the suffix extension).

? 2. After that, we open a new text document and enter:

: start

Start cmd

switch to

begin

When the input is finished, we click Save to save it to the desktop.

? 3. After saving to the desktop, we need to change the suffix "txt" to "bat", and a safety prompt box will appear after modification. Just click "Yes".

? Finally, when we double-click it, there will be an infinite pop-up window, similar to a computer virus.