Hi, today I did a bit of an upgrade for my mac (Specs will follow). I upgraded my original HD with an SSD 120gb and placed the old 500gb HD into an Optical Drive adabter and connected it that way. All worked perfectly (except for the one screw I had to drill through because my tools sucked... ). I installed Mountain Lion on the SSD and started setting it up a bit. Then I tried to boot into my Windows partition that I still had on the HD that is now n the Optical Bay. When trying to boot it nothing happened except black screen + blinking cursor. So I thought I'll just completely reformat the HD to Mac os Extended Journaled. Then Using bootcamp make a 150gb partition for Windows 7 and reinstall it again from the installation USB I had from last time. Partitioning Works fine, restarts and installation starts. All works fine until the part where I have to select the partition to which I want to install Windows. It says Windows cannot be installed to Disk 1 Partition 3 (Show Details) When I click for the details: "Windows cannot be installed to this disk. This computer's hardware may not support booting to this disk. Ensure that the disk's controller is enabled in the computer's BIOS menu." No Idea what this means... I really want to have Windows on my second Harddrive. I want the 150gb for windows and then the rest of the HD (350gb) to store files which I don't need on my Mac OS X running SSD since that only has 120gb. I'm kind of lost. I can't really find anything on this topic. Some stuff that might be on it but i'm not sure because its way to advanced stuff for me. I am quite advanced at using Mac os, but when it comes to windows, i'm a complete newbie. If anyone has a solution for this or any help I would be extremely greatful. Cheers Guys and Girls Salocin.