Use EasyBCD to create dual-boot Ubuntu 13.04 and win 8

TYPE According to the Ubuntu documentation, Ubuntu 13.04 by default uses grub 1.99, or Grub 2. So, when it asks for the TYPE, you choose Grub 2.

DRIVE Now, I don't know the details as to which you installed first (Ubuntu or Windows) or where you installed Grub (to the main drive/partition, or the linux one) but we should assume that for Drive, you need to choose Partition 6, or the Linux one.

Simple solution to your problem will be using Boot-Repair.Run Ubuntu live cd.Open terminal and type:

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

Press Enter and type:

sudo apt-get install -y boot-repair && (boot-repair &)

And press Enter. Now type boot-repair and press Enter once again. Use *Recommended repair. It will do the job.