Have an older Dell Latitude E6430s. Was working fine but now I keep getting this error message when I bootup. Will show a small message saying to press F1 or F2 to continue or enter bios. When I press F1 I'll get the invalid partition message. Tried enabling and disabling the Legacy and UEFI settings with no success. Always reverts back to all the inputs being checked. Anyone know how to fix this? Thanks.