File: — Cavity.busters.v35.zip ...

When Elias, a college sophomore with a dying laptop and a passion for data forensics, downloaded the file, he expected a simple executable. Instead, the zip contained three items: titled OPEN_ME_LAST.txt .

of what sounded like a high-pitched dental drill playing over a techno beat. File: Cavity.Busters.v35.zip ...

The zip file then deleted itself, leaving no trace it had ever existed. To this day, people on old tech forums still argue about whether Cavity.Busters.v35.zip was the most sophisticated optimization tool ever written or a ghost in the machine that only appeared to those with a truly "decaying" PC. When Elias, a college sophomore with a dying

Within ten minutes, his sluggish laptop was running faster than the day he bought it. But when he reached for the OPEN_ME_LAST.txt file, his mouse cursor began to move on its own. The Dentist’s Note The zip file then deleted itself, leaving no

The text file opened, and a single line scrolled across the screen: "The first cleaning is free. Brush your registry daily. - The Dentist."

called Buster.exe with a pixelated icon of a smiling molar.