Ubuntu: Why do I get a “???” error when I try to install Ubuntu 15.04 64-bit?


I am trying to dual-boot Ubuntu 15.04 64-bit on my laptop, a Toshiba Satellite C50D-B-120.

I have created a 241 GB partition. The other OS on the computer is Windows 8.1. The installation media was a DVD+R disk connected via USB drive. Secureboot and fast boot were disabled.

When I get to the installation page, I get this screen:

[Image in comment]

When I click continue, it loads for a few seconds and then this comes up:

When explaining what to do, please also explain why this occurs.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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