One of my users has a laptop running Win 7 Pro x86 with IE8 and Firefox. For the last several months he has noticed that after he fills out any kind of online form and submits it he has to refresh the page multiple times for the next page to show up. When he submits a form it just takes him to a blank white page with "Done." in the status bar at the bottom. This problem exists in both Firefox and IE.
When it first started, he only had to refresh the page once for it to come up, but it seems to be getting progressively worse. Because it's effecting both browsers, I'm not sure where to look.
It shouldn't be a virus, as all scans come up clean.
I've installed all windows updates (up-to and including SP1 for Win7).
He has plenty of hard drive space.
None of his programs are leaving errors in the event logs.
Any ideas of what might be causing this?