Try changing the boot order of your bios setting and boot from CD to do a repair see if that works !
* Many computers out there are not configured to boot from the CDROM. If you cannot boot from the CDROM, this is probably due to the boot order of your computer being incorrect for CDROM booting.
You have two options:
1.) You can change this in the BIOS during POST, which is usually the very first screen displayed by your computer when you turn it on.
2.) Many newer computers have a selectable boot menu by tapping F8, F10 OR F12 right during/after the first POST screen. This will allow you to temporarily boot from a CDROM.
To enter your BIOS, most users here will press the DEL key.
Most users with Dell, Gateway, Sony & HP systems will press F2.
Many Toshiba laptops are F2 or require you hold the ESC key when you turn the system on. Your notebook will report an error and prompt to press F1 to enter setup. Do exactly that.
Compaq users will usually have to press F10.
IBM typically uses F1 or F2.
Other brands may have different keys to press to enter setup, but F1, F2, Del, Tab and CTRL+S or CTRL + ALT + S are the most common ones I'm familiar with. Often, the BIOS will display what button to press to "enter setup" during POST.
When you enter the BIOS setup, you need to change the boot order. The CDROM should be setup before the Hard Drive. Each BIOS is different !
Once changed then start a re-install from there !
Good Luck hope this helps !