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Click the Windows logo in the bottom-left corner of the screen, or press ⊞ Win. This will search for the Notepad application. It's the blue, notepad-shaped icon at the top of the Start window. If Notepad is blocked on your school computer, you'll instead need to perform this task on your own computer. This string of text will load the Command Prompt app when implemented. It's in the top-left corner of the screen. This is an option in the File drop-down menu. The ".bat" part of the name is crucial to creating a batch file. For example, if you name your file "cmd", you'd type in cmd.bat here. This will ensure that your file is saved as an executable file, not a text file. It's in the bottom-right corner of the window. If you're performing this step on your own computer, plug a flash drive into your computer and select it as a save location before clicking Save. Doing so should open Command Prompt if your computer allows batch files to be run.  If you can't run the program on your school computer, plug your flash drive into the computer and then double-click the batch file. If Command Prompt opens but won't allow you to type, it's administrator-locked, meaning you won't be able to use Command Prompt on your current account. Try using an installation drive instead.
Open Start . Type notepad into Start. Click Notepad. Type cmd.exe into Notepad. Click File. Click Save As…. Enter a name for your file, followed by .bat. Click the box next to "Save as type", then click All Files. Click Save. Double-click the batch file.