This is not official, but several Laptop Notebook and Netbook Computers, that have been having from minor to major problems. Minor or Major depends on the person using.. I have found that If the Manufacture is SAMSUNG and your system has problems.... the fastest fix is.
1. buy new Memory - anything except Samsung - replace in your system.
I have had the honor to do several times, different System Manufactures ( DUH - Dell, Acer, Hewlett Pachard, Gateway & Toshiba). Instantly the problems STOPPED... all memory was DDR2.