AK-41. I installed a second 500GB M.2 SSD in the available slot, and it is not being recognized, or at least does not appear in the drive list through Windows. WHAT SHOULD I DO? [I posted this question also under one started under a similar subject, but different specific issue - the other user was installing an SSD drive using the cable, rather than the available slot. Apologies if the second post is irritating or against community policy!]