|The hard drive may have failed so you need to test it to make sure. Find out what brand of hard drive it is, then click the appropriate link at top of this page: http://www.tacktech.com/display.cfm...|
You'll need to download the DOS version if Windows won't start. It's an ISO file from which you can make a bootable CD using IMGBurn from here: http://filehippo.com/download_imgburn/
Create the CD then boot your faulty PC from it to test the hard drive.