Dell Inspiron 8500 lap top with XP-sp3 and all updates and six years old. 95% use is on a docking station. Started out with 512 ram and then last year added a 1GB stick to end up with 1.5GB. All has been well till a few weeks ago and I started her up and all was fine till a black screen poped up telling me that my memory had changed since my last session. I needed to hit the F1 key to continue or hit the F12 for set up. I have been hitting the F1 key and everything works great. BUT!!!!! My systems information was only showing 1GB and not the 1.5GB that was installed. So, I bought another 1GB stick thinking that the original 512 had bit the dirt. Installed the new 1GB stick and fired her up and everything was back to normal and the systems report showed 2GB installed. Well! Things have gone well for three weeks. I'm back to the black screen. Systems showing 1GB. Any ideas Whiz! I have included an E-mail address if the fix for this gets involved. I have learned a great deal from the computer post on this site.