The hard drive has errors on it. What brand of hard drive is it? You'll need to run the drive manufacturers diagnostic test to fix the errors.
http://www.computerforum.com/211596-list-hard-drive-diagnostic-utilities-test-your-drive.html
It won't boot in safe mode either. You will have to either make a bootable cd or slave the drive in another system and use seatools for windows.
What brand of drive is it?
Download seatools for dos iso. Burn the iso file to a cd and then boot to the cd on machine. Run the long test, will take an hour or so. Or put the drive in another system and download and run seatools for windows.
Download seatools for dos iso. Burn the iso file to a cd and then boot to the cd on machine. Run the long test, will take an hour or so. Or put the drive in another system and download and run seatools for windows.
At the end of the test it should tell you what was wrong and if it was able to fix it or not.
Yes, replace the drive.
You will need to determine if its a sata or ide drive and get one that matches. If it requires the wide flat ribbon cable the. It's an ide drive. If it has the smaller cable then its sata.
Yes, that would be sata.