I don't think there is anything wrong with your ipac, I think the problem is you have hotkeys enabled for your video (guessing an onboard intel set). Just disable hotkeys and that should take care of your problem.
On my XP system:
right click on the desktop
select 'graphic propeties...'
click on the Hot Keys spot on the left side of the box
turn off the checkbox for 'Enable Hot Keys'
Z