After days of digging around I have found out that the boot issue on my motherboard is something to to do with Erp settings. However, I have already disabled Erp ready in the bios and the issue still occurs. Of my system turning on for a second or two and then it shutting down and then automactically booting into windows. I have read something about S4 and S5 power settings but apparently that what causes the issue. But in recent testing I have found that If i set my ram speeds to auto and not 3000Mhz it boots perfectly fine without any issues or double booting. Could this be a motherboard issue, RAM or CPU issue??? I am super confussed and the a week of research has not helped just want a solution. I have my pc in a UPS and this is powered down each night. So this issue is starting to become a pain.