Racer, I have exactly the same set up. 2 lap tops, a new one with XP Pro and an old one with W2K Pro. HOWEVER, when I run my charting and trading software on the XP Pro laptop, it freezes. The old one works fine with exactly the same software (a message about the page file size being altered appears, to which I just hit "OK").
So, the old, slow loading W2K Pro enables me to trade every day. I will NEVER upgrade it.
I'm not technical enough to delve into the problem with the XP Pro further, increasing the RAM hasn't helped. I'm told it's supposed to increase the page file size automatically.
If I were you Samtron, I would stick with W2K, it seems to be the more robust of the two operating systems.