Current Windows arrive with Secure Boot, UEFI and can block boot and install of other OSes. Research CSM (corporate stable mode) along with UEFI and you should discover prior discussions.
Bob
have windows 8 pre installed on my hp laptop, i downloaded linux ubuntu but whenever i try and run ubuntu i keep getting the same error message: oxc000007b. I tried deleting it so that i could reinstall the software and then was given another error message which was: ox80004002. could anyone tell me what this might be or what ive done wrong?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic