HideoK on 29 September 2008
I had the same problem with a virus from vg chartz. In IE7 my anti-virus often detects a trojian virus from vg chartz with a .htm file extension. A pop up then tries to enable a download a the top of the browser, but my anti-virus always shuts it down and quarantines the .htm temporary internet file. After a number of times seeing this happen on vgchartz, I switched over to Firefox 3 and I have not been having the problem anymore 
Firefox > IE7
I'm never going back to IE.
