When the machine was purchased it was equipped with 10mb installed 8mb enabled, of which the two not enabled was the lenovo installed memory. I have replaced the 2mb from lenovo with two additional 4mb sticks of crucial CT51272BA1339 . The machine now shows 16 mb installed and 8mb enabled. I tried taking all sticks out, and adding them one at a time in sequence according to the instruction manual, with no luck. We are running Windows Server 2008 R2. Can anyone shed some light on how to get the additional memory enabled? Thanks!