Anti-xxxx software can definitely contribute. There a lot of thing that can contribute.Let's start with what your game settings are, and a DXDIAG output.
I Will get those to you when I get home.Thanks
Try killing the anti-xxxx software first and see if that is the source.Often, this is the only way to figure out what the issue is. Simply trying things until you find the culprit.
Toolbars are nothing more than pretty viruses.