I have changed the BIOS in my Toshiba Satellite Pro C850-1CW so I can boot from the DVD drive. Opened the Mint menu and selected to install the program. The first problem I encountered was that the Windows 8 operating system was not detected and I could either install Mint by overwriting the existing operating system or by creating a new partition. Unfortunately, I could not understand the instructions as to how to do this! (I am a NEWBIE after all!!!!) Why am I not being given the option of installing alongsde Windows?