I have a very strange problem here. I have a 4-year-old laptop (HP ze5300) that only shows 192 MB of Ram on the windows system screen. Now it has 2-256MB simms installed in it . They have also been replaced with the same recently to see if they were the problem. Still shows the same. The Ram does pass the windows Ram test you can run at startup. I know there is a problem because the computer is very very slow when a load is applied to it. I am fearing the worse, but hope for a simple solution. Thanks for the help charles