|It sounds like the hard drive has failed if it won't format. To confirm this, test the hard drive with the drive manufacturer's diagnostic software for DOS. The download links are on this page: http://www.tacktech.com/display.cfm...|
The DOS version is an ISO file from which you can create a bootable CD using IMGBurn from here: http://filehippo.com/download_imgburn/
Boot you faulty PC with that CD to run the drive test.