I'm using a Samsung ultrabook. I used the windows installer to install Ubuntu 12.04. When I restart PC I get an option to choose which boot to use. If I choose Windows 8 - everything is fine. No problems with Windows 8. If I choose Ubuntu the boot fails. There is this information on the black screen:
\ubuntu\winboot\wubildr.mbr Status: 0xc000007b required file contains errors
I'm not sure what is wrong or how to fix it. Can anyone help?