I have just installed a SSD and moved my original HDD to a optical bay caddy. It all worked fine until I fitted the 2nd HDD optical bay caddy. After I did this it now boots from the 2nd HDD optical bay caddy rather than the SSD in the main drive slot. It has also moved the SSD to drive letter E, with the HDD as C. I would just change them back but I'm not sure whether you can just do that when an OS is installed and running on them. My type of BIOS does also not display any of the drives, just displaying 'OS boot manager', 'CD Rom (Internal)', 'USB Key', 'CD Rom (USB)'. I have a HP Pavilion G6 laptop and I'm running Window 8. Any help would be much appreciated. Thanks in advance.