I restarted. Instead of booting, my desktop wallpaper appeared behind the BIOS screen—a ghostly overlap of galaxies and POST text. Then a download window popped up… while the OS was still loading.
My hard drive began clicking like Geiger counter at Chernobyl. A second error appeared in Comic Sans (COMIC SANS—on a system font dialog): "We've encountered an error downloading your error. Please error the error before restarting your error." I pulled the power cord. The laptop stayed on. The fan spun up to a jet-engine whine, and a text file opened on its own: your_files_are_encrypted_for_fun.txt . Inside? Just a winking emoji and a link to a Rick Astley video.
I didn't sleep that night. The next morning, Windows booted normally. No update history. No error logs. Just a new folder on my desktop named "Oops."