i installed both 1x2GB ram alone and it worked fine.One of your 2 GB sticks is probably bad
I looked for my laptop specs here and says that supports ram size up to 4gb.Also, i updated the BIOS but the problem still occurs.When loading the windows it shows me a blue screen with the message "DRIVER_IRQL_NOT_LESS_OR_EQUAL".Did you check the laptop support site to see what the memory config it can work with? Check for a BIOS update if it will work with that you are trying?