I had the exact same problem with a Latitude D830, but it is solved now. The cause was the "POST behaviour" BIOS setting. You must set it ONCE to "thorough" instead of "fast" or "skip". Mount the SSD and start up. The BIOS will take longer, but it will detect the SSD. After installing windows, you can set the BIOS back to "fast" - it knows which SSD is installed and remembers it. I have BIOS version 11, which is not the most recent one. No need to upgrade!