My build is here: https://pcpartpicker.com/list/zKHTNQ I have a dual boot of Windows 8.1 and 10 Pro. Windows 10 Pro updated and ever since it has been flashing/blinking off and on whether it's boot up normal and/or safe mode. In Windows 8.1 it boots up normal. I also change out the graphic card thinking that may be the issue but the replacement does the same. Thanks in advance for any assistance that is provided.