My lap top was running so slow that opening a simple web page took a minute or two. I found a web site that will scan the memory already installed on your computer and will give you an upgrade option that is suitable.  http://www.crucial.com/systemscanner/index.aspx  . I took the test and printed out the info and drove to Fry's Electronics bought the memory ( only $12.00 ). I got home flipped over the laptop and installed the memory. This was my first time messing with a laptop. I also had the option of purchasing the memory online. When I open a web page now I click it and "bam"  like Emiril LOL. I can not believe what $12.00 did for me!