I have changed my motherboard from ASROCK ab350m pro to MSI b550m mortar wifi. I have not changed any other parts including the SSD with windows 10 installed. I can only get into BIOS and the boot LED on the board is constant. Using a windows 10 installer usb works but I dont want to lose personal files or have to re-download all my games. Any reason why this board cant boot off my previous windows boot partition? Do I have to clean install windows or is there a BIOS setting I have to change?