That was a terrible sound to hear unexpectedly.
The Windows XP Shutdown Theme On 15 Different Instruments In A Row

This is a clip of percussionist Joe Porter playing the Windows XP shutdown theme on 15 different percussion instruments in a row, accompanied by a string quartet. It brought back memories. Mostly, of my computer shutting down in college when I was in the middle of doing something important. “Like creating the perfect AIM away message with song lyrics?” That’s how we flirted in 2001!