Sounds like your disk drive has a problem. Now is the time when you need a CD drive to fix it or attempt to fix it by running the Check Disk Utility. To run the check disk utility you will need a repair disc or a operating system disc. Put the disc in the cd drive and boot from it.
![While While](http://www.eassos.com/how-to/images/a-disk-read-error-occurred-01.png)
Follow these steps:: 1. Run CHKDSK /R /P from the recovery console (it will typically find no error) 2.
Run FIXBOOT from recovery console (typically has no result) 3. Run FIXMBR from recovery console (typically has no result) 4. Run the manufacturer's diagnostic utility, downloaded from their website (it will typically find no error) 5. Changing the drives from cable select to Master/Slave may fix it. Replacing the data cable may fix it, but usually not. Setting the BIOS to use defaults may fix it, but usually not.
Changing the BIOS drive settings from auto to user-specified, ensuring that LBA is selected may fix it. Pulling the CMOS battery to let the BIOS lose it settings may work.