The unholy alliance of tech and fantasy nobody asked for. Some genius turned the HP logo into "Harry Potter" and the Windows logo into Hogwarts houses. Then Hagrid delivers the punchline that's been hiding in plain sight for 20+ years of Windows vs Mac debates.
Just picture the alternate universe where instead of blue screens of death, you get "Expecto BSODum!" and your computer troubleshooting involves waving a USB stick like a wand.