There is a known issue with web pages that have fields in Internet Explorer, but nothing in your post to indicate that was the application in use.
As always, decide if you want to be PARASITE FREE or not.
Tools, more discussion at http://reviews.cnet.com/5208-6132-0.html?forumID=32&threadID=1313&start=0
I find that this one PC will have a delay,
when moving the mouse the pointer will take a few seconds to keep up with the mouse, also anything
one clicks on takes a few seconds for it to do anything, sometimes the whole systems will freeze for a few seconds, I have tryed a defrag, scan disk nothing seems to help, even a reboot does not help
most of the time.

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