Posted 07 August 2008 - 10:08 AM
I recommend scanning the hard drive with a diagnostics utility and see if the hard drive is failing. Go to the manufacturer's website of your hard drive and download the diagnostics utility. Put the program onto a CD and boot the computer to the diagnostics CD.
Afterwards, follow the on-screen instructions and let the program scan the hard drive for any errors. If the diagnostics utility gives you an error, the hard drive is failing and this would be a good time to backup all of your files ASAP.