Try to install any
Blue-ray player Software.I downloaded PowerDVD 13 Ultra and i can play now all my blue-ray discs again.
You have an default Blue-ray player at the driver disc you have from you're G75. So install it if you havn't it on you're computer.
ACER PREDATOR G9-791 |Intel Core i7-6700HQ |16 GB RAM |GTX970M 3GB |FULL HD | 750GB SSD | Samsung 850 PRO & 2X M.2 SSD RAID 0
G75VW |Intel Core I7-3610QM |24GB RAM |GTX670M 3 GB |FULL HD | 526GB SSD | Samsung 840 EVO & 850 PRO
GL552VW |Intel Core i7-6700HQ |12 GB RAM |GTX960M 3GB |FULL HD | 256GB SSD | Samsung