Buying Additional RAM (Memory)
Purchase the right kind for your computer. Check the documentation that came with your computer for specific information.
Get more RAM than you think you need. Operating systems and application software require more memory as the newer versions are released.
Many laptop computers have only one or two memory slots. You may be replacing memory, not just adding it. Make sure the amount of memory you buy is enough after you remove the old memory.
You may choose to install the memory yourself. If so, follow the installation instructions and take all safety precautions, including using the anti-static protection.
If you choose to have someone else install the memory, be sure it is someone whose work you trust.
After restarting your computer, check the memory properties to make sure the computer recognizes the total amount. If not, make sure the memory chip is correctly seated in the slot.