I have an HP 800MHz P III Notebook computer, It came with Win ME. I recently install a full version of XP Pro, now when I go to system properties it says I only have 644 MHz. Then I can go to it again and it will say I have 796MHz. Is this normal for XP Pro or is there something I need to tweek or change? I have 256mb of ram and it always displays it correctly. Thanks for any help.