How to manage Windows 8 infinite repair?

Hi everyone,
When booting up my computer, I cannot start my Windows. I am always redirected to enter CMOS with a delete key. And then, if I waited for few minutes, I will have an automatic repair and then restarts my computer. The problem is, it always comes back to the automatic repair window which shows a different issues. I couldn't install Windows 8 since I don't have my disk neither repair it through USB. What can I do?
