I have a Sony Vaio laptop - product name - VPCF23S1E, Model PCG-81313. I changed the hard drive and I reinstalled windows 7 64 bit. After installing my blu ray writer unit not recognize any blu ray disc. The unit tell me to insert a disc blu ray and eject the disc . The unit is functional, read any DVD or CD, but will not recognize blu ray. Blu ray is PIONEER BD-RW BDR-TD03. Before reinstall Windows, the drive worked perfectly and i recorded blu ray disc with it. Now I can not even read discs recorded with this unit. Please help me if you know any solution thank you. I instal all the driver and nothing : (