I have used Crucial Memory in the past to upgrade other laptops and never have any problems. My current laptop is HP G62 which had 4GB memory. It was running slow as i do a lot of photo editing. To upgrade couldnt be easier, go to [...] and download the system scanner. The result tells you whats in your system now and how much upgrade is allowed, there is also a screen showing all the options you can buy. Its as easy as that. At the time of purchase there was only about 50p difference in price between Amazon and Crucial so I bought from Crucial, but Amazon is a couple of pounds cheaper now for the 2 x 4GB kit. (The review is about the product, not the supplier). My laptop now runs on 8GB and it flies. No freezing or slowing down. I would recommend Crucial memory to anyone thinking of upgrading .