The award for the most confusing message I've seen in a quite a while. Added 2GB more to my Dell D820 laptop, so it now has 4GB. Boot. Then it says:
The amount of system memory has changed. If you did not change your memory... To resolve this issue, try to reseat the memory.
Hmmm. Take out the memory. Reboot. Message comes back. So what now? System screwed?
But Google is my friend.