I'm not sure,but you can try the VISTA FORUM
Have you run any scans?
Also when posting the words in red above are there for people to help you.
"Note: If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem...."
They might ask you what browser you have.
I'm using a Dell Inspiron 640m with no modifications to the system whatsoever, it's direct from store.
However, one funny thing, right-clicking on the desktop or desktop icons does not work at all. I can right-click on hyper links in the web browser but right-clicking in the desktop, desktop icons or icons in folder just does not work! What gives?