Strangest MS KB Article Ever

Does your PC randomly play classical music? Yes? Good news you aren’t crazy.

According to KB 261186 your PC is acting normally.

During normal operation or in Safe mode, your computer may play “Fur Elise” or “It’s a Small, Small World” seemingly at random. This is an indication sent to the PC speaker from the computer’s BIOS that the CPU fan is failing or has failed, or that the power supply voltages have drifted out of tolerance. This is a design feature of a detection circuit and system BIOSes developed by Award/Unicore from 1997 on.

Believe-it-or-Not

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