Dual boot mate with Unity?

[wolfman]

Just trying to find the cause (or possible cause) of your dilemma.

Another tact, how did you install?, via disk or USB?.

Did you follow this advice?:

Burn ISO's at the slowest possible speed

Also, don’t use “no-name” DVDs - they are a false economy. I made the mistake of buying such DVDs from the local Poundland and ended up with a small pile of useless pieces of plastic before I threw the remainder out …