Hi Megamouse,
Nope, it's definitely loading into the OS as Windows 7 asks me to login.
The original OS is still loaded on the HDD and I want to reformat the whole drive as part of the clean installation of Windows 7. The boot sequence in the BIOS just doesn't seem to do anything, like I said I removed the HDD from the sequence and it still boots the OS through the HDD. Even when I hit F12 and manually select to boot from the CD ROM, it continues to load the OS from the HDD.
I've logged back into the BIOS and it's saved and remembered my boot sequence settings and the optical drive is working as I can access the Windows 7 disk through explorer when Windows loads.
It's quite possibly the most frustrating process to continually loop around and not get any further...