This morning had a look at the system properties thingy on my pc only to discover that it said I only had 512MB of RAM. It should have said 1GB, so I opened up the case and had a peek inside, both memory sticks looked like they were installed ok. I then carefully took both out and inspected them, they looked fine. After I re-inserted them both, closed up the case and rebooted, system properties reported that 1GB was again to be found. Could this be a symptom of failing RAM? Or as my pc was left on overnight, could it have just got too hot?