I have seen that there are a lot of threads about this problem.

I had Windows 8 installed on my series 3 samsung i5 computer and I tried to install ubuntu 13.04.

This is what I did:

Because of the secure boot I can't install ubuntu from the dvd. So I went in the bios and disabled secure boot and enabled ''CSM''. I went out of the bios and windows 8 couldn't boot more. So I follow a guide on this thread ( Installing on a Pre-Installed Windows 8 System (UEFI Supported) ) and on ubuntu I tried to repair the boot by inserting this code in the terminal:

sudo add-apt-repository ppa:yannubuntu/boot-repair 
sudo apt-get update
sudo apt-get install boot-repair

Then I ran boot-repair and I follow all the steps. Then I reboot the sistem and saw the black screen that says:

error: file '/boot/grub/i386-pc/normal mod' not found
grub rescure>

Now I saw a lot of guides about this problem but I can't understand how to reistall ubuntu trough the live dvd that I used to install it the first time... I put it in the computer but nothing appears.. so what should I do now? I'm a noob on ubuntu and I have read all the things about this grub 2 install and know where the problem comes from but how to start the dvd??