buzzing noise

My Toshiba laptop is also buzzing. First the floppy drive wouldn’t read and made shreiking noise, but the computer’s hard drive worked fine. After that session and shutting down and starting up the entire laptop is now buzzing, plus I had some hesitation issues. I deleted some spyware and the software end of things seem fine, but the buzzing noise is still there, but not as loud. Can it only mean the hard drive is dying? The mileage on this computer seems low for the drive to be dying.