Lesson 1: The Classic Prank
Start with the basics: fill someone's computer with an endless loop of cat videos. It's a timeless classic.
Step 1: Find a suitable victim (aka a friend who's easily annoyed).
Step 2: Open their laptop, and create a folder called "CATVIDEOS".
Step 3: Place a single MP4 of a cat doing a backflip in that folder.
Step 4: Create an AutoHotkey script that runs a loop of that video, with a 0.5 second delay between each iteration.
Remember: the key to a good prank is to always keep it light-hearted and never, ever, ever, ever, ever...
...ever...
...ever...
...ever... (get it? Never, ever, ever...)