Posted 16 August 2011 - 04:41 PM
If I were you the first thing I would do is find out who the manufacturer of your hard disk is and download their integrity verification utility from their website, which will allow you to make a boot disc (in most situations) and verify the physical integrity of your hard drive. This kind of thing could be caused from many different things and you have not provided many specifics. While you are at it download an ubuntu live disc which will allow you to boot into the linux operating system and run from the disc (just like the manufacturer's utility) and from there you can access your hard drive and give us the output from the files you are trying to get.
Just so you know there is probably a better way to do this but this should get you started, as it is how I would proceed to figure out the issue.
NOTE: with the ubuntu boot disc you can probably also back up your files to an external hard drive or usb flash drive so IF you do have to reformat and reinstall your operating system you can save all your main stuff, such as music movies pictures documents and the like!