Hello. I recently bought an Asus P8B75-M LE along with an MSI GTX 660 Ti OC V1 and an i5 (My OS is Windows 7 Home Premium 64bit). Every time i start the computer i get this message: "The current BIOS setting do not fully support the boot device. Click OK to enter BIOS Setup" and a yellow text: "Go to Advanced > Boot > CSM Parameters, and adjust the CSM (Compatibility Support Module) settings to enable boot device.". I've tried for hours, but to no avail. I've updated the bios to the latest version, too. But i believe i know what the problem is. I need to disable Secure Boot, but the option to do so is greyed out. The only option i am able to change is "OS Type". Please, help me! I'm getting really frustrated here.