I called HP and they said that since my initial one year for tech support in up, that I willl have to take it back to Best Buy for them to trouble shoot this problem. Crucial, the company that I purchased the memory said that all of my memory is working as designed. I did incease my memory up to 12 from 8 GB with not problem. The moment I tried to max it out at 16 GB, the system will run for a short while, then crash. When I take it back to Best Buy I'll give them the addition 4 Gb and see what they say. I do have an extended war... I've tried just about everything that I can. I believe that my system is current with all of the updates.