I have an hp compaq nx 9010 laptop and recently got this message. i wonder if the change in ram has done it>? 1 chip is the original 256 mb, the other is a 512 - i thought compatible... any tips would be appreciated. thanks
Sometimes when you add memory, if the card is not an exact match to what is already installed, you can get problems.
Doing a repair install of XP will usually set up the configuration and cure the problem.
Look in this XP forum, fourth post from the top, for the directions to do a repair install.
I have seen some systems fail from adding just 1 memory stick, until the OS was repair installed. Good idea to back up all your personal files before trying anything else.