I'm trying to boot into Ubuntu but it won't boot. The screen shows a dash "-" and than system shuts down. And no operating system is installing on my machine. Any suggestions?

@RiturajRautela Yeah. Don't ask here. This chat is for asking moderation questions. You should ask a question on the main site.

I have put a question, can you help me out? superuser.com/questions/1452459/os-installation-error

@RiturajRautela No. I already told you this chat is for moderation questions.