There is a forum rule against repeating, but I just made an exception for someone and it is quite obvious it is necessary for me to do so again here:
"YOU'LL WANT TO FOLLOW WHAT MY SIGNATURE SAYS TO DO.
Your memory is defective or set unwell in the bios.
If what you post shows well, you'll have to replace the memory entirely with a new matching set.
Let's see what the screen shots show."