Recently acquired an E6420. Used a HDD temporarily, and got Windows loaded and a few programs installed. I purchased an SSD for the system, and mirrored the HDD directly to the new SSD when it shipped. I have now installed the SSD, and upon posting, the system will notify me that it has detected the drive (SanDisk SDSSDX24) but will show that the drive is "Incompatible" in red lettering under the status column. The system will not boot and will tell me to insert a bootable media device. To put it simply, what is going on, and why is this happening? How can I resolve it?