Macbook Bootcamp Errors HELLP

Hi,
I have a macbook and I have been running Bootcamp to use Microsoft Windows on my macbook. It has been working fine for about 2 years.
My macbook is defaulted to turn on to Windows first, unless I hold down the option button to choose between windows and mac.

I am now getting an error stating to "Press any key to boot from CD. disk Error"

I cant access the windows side because of this error message, nor can I get back to my mac side. Is there anything I can do besides reinstalling OSX over again? I do not want to loose any of my data and files.

Thanks