Welcome to the TSF!
Reseat the memory. If that does not work and you have more that 1 stick of memory remove 1 stick and see if the error goes away. If not replace the first stick and remove the next stick and see what happens.
Reseat the memory. If that does not work and you have more that 1 stick of memory remove 1 stick and see if the error goes away. If not replace the first stick and remove the next stick and see what happens.