I have researched several other solutions and tried many of them. I recently just tried boot-repair which helped me get past the 'first' black screen. Now, I am currently stuck at the 'second' black screen with underscore in the upper right hand corner. I have the paste code from the boot-repair here:
I can boot up Windows 8 perfectly, so I am really confused. Luckily I was able to back-up my documents (not any installs).