Have you been working at your computer and downloading different software to get certain things set up? Isn't it frustrating when that window opens up and says you don't have enough memory to download that software? It's happened to me before buying the computer I have now. Buying more memory, takes a skilled individual who knows their ddr, SDRAM, RDRAM, EDO, Cisco and many others. I'm not a tech so, that leaves me totally out. I call my computer tech son, who has an associate's degree in this field to help me. He can usually find the right one for my computer and tell me the price.