Sara's dashboard

I have a student who is using our class wiki (2.0 pbwiki), and when she tries to edit a page, it gives her a page error.

I can see that she's logged in and editing.

It does not show the toolbar or any text in the edit box. She is using a dell desktop with Internet Explorer installed as her browser.

She can use her laptop withour any problems. What could be missing - software? plugins? on her desktop?

Any ideas?
Thanks!