|"A disk read error occurred"|
That indicates that the hard drive may be faulty, in which case attempting to re-install the OS will do no good at all. You need to test the hard drive with a bootable CD to check for hard drive failure, and replace the drive if the test fails.
Use HGST Drive Fitness Test. Download the CD Image from here:
Then download and use IMGBurn to create a CD from the CD Image:
When you've made the CD, boot your faulty PC from it and the testing software will open.