grub rescue...delete ubuntu...windows 8...purple screen

Okay so I noticed I am basically screwed and have been working on this for hours. I tried to dual boot my windows 8, but I am still a beginner and failed. I am at the point where I delete ubuntu, get stuck on grub rescue and try to use liveusb to fix (did not work). I tried to leave ubuntu on, but i am now stuck on hanging purple screen (tried to use repair and other solutions nothing worked). I just want to get back onto windows 8 and dual boot this properly.