Sorry for late reply, sounds like the computer isn't recognizing the ram for some reason so there could be a motherboard problem. May need an expert to provide further help. At the moment I'm looking at a friends laptop which only has 2 gb of ram installed running windows 7. It's painfully slow and unresponsive and keeps hanging, when I look at the resource monitor almost all 2 gb of ram is being used by the OS. W7 is no good with only 2gb of ram, that's for sure.