No one ever connected that machine to the internet again.

Leo, the senior tech, had been warned about this day for three years. “The FLIR Tools 4.1 CD is in the safe,” his boss had said. “Don’t lose it.”

He downloaded it. The progress bar crawled. 10%... 40%... 87%...

Leo plugged in the thermal camera. The USB negotiation took eight seconds, then — a click. The device manager lit up. FLIR SC660 recognized.

As he ejected the camera, a small dialog box appeared: “FLIR Tools 4.1 has reached end-of-life. Would you like to check for updates?”

He ran the installer.

At 100%, he scanned the file with an old portable copy of Malwarebytes (definition version 2020.01.15). It came back clean. No promises, but clean.