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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.
Although these symptoms may appear to be virus-like, they are the result of an electronic hardware monitoring component of the motherboard and BIOS. You may want to have your computer checked or serviced.
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Microsoft Windows 2000 Server, Microsoft Windows 2000 Professional Edition, Microsoft Windows 95, Microsoft Windows 98 Standard Edition, Microsoft Windows 98 Second Edition, Microsoft Windows NT Server 4.0 Standard Edition