Hello grandpaboo,
You can find out if this error is caused by an add-on by running IE8 in No Add-on mode. To do so: Go to Start -> All Programs -> Accessories -> System Tools -> Internet Explorer (No Add-ons).
If this fixes the issue, then go to Tools -> Manage Add-ons and enable the add-ons one by one to find which one was causing the problem.
Hope this helps! If this doesn't seem to be to root of the problem, let us know and we'll try something else :)
Cheers,
Cassandra
IE Outreach Team