After further checking, I have found that TRIM is enabled and since the SATA driver is also the AHCI driver, I am going to assume that AHCI is enabled too. I have to say that the response from Sony was via online chat and the responder seemed to be covering his butt. I felt like I knew more about the machine (and issue) than he did. I'm sure the company line is, 'your machine is old, better get a new one'. It's not two years old yet! I'll let you know how it goes. Thanks.