Hi, i can talk for my self, i still have no clue what is the reason of this.
What i can say is that i have tried several different xp pro, with different graphic cards (Gforce and ATI), different Antivirus,...

Another thing i can add is that after installing a windows i always set it to maximum performance, no xp styles, no system restore.
In resume i have a windows xp looking like win 2k.

Kind regards