I have a Toshiba Satellite S75D-A7272 laptop with an AMD A10-5750 APU with Radeon HD graphics 2500Mhz 4cores, 4 processors. 8Gb RAM, AMD Radeon HD 8650G graphics card. 1TB HDD, 64-bit operating system with Windows 8 and I would like to downgrade to Windows 7. My bios is UEFI and according to the EUSUS Partition Master, the partitions are GPT. I am requesting a Bios Mod please, I have hunted all over this forum and it seems like no one has done one for this model. I have read how people help each other out in here and I would like to say thank you to all those who help us newbies and dummies out. My secure boot is enabled.