I have a SharePoint 2010 portal that will not open in Internet Explorer 9 on one desktop, but will open in Firefox and Chrome. On another system, with Internet Explorer 8 the SharePoint portal will open.
When I say open I mean that I get the popup for authenticating. I have ensured that pop-up blocker is disabled. I have tried adding the site to the trusted sites tab in Internet options.
I am just not sure what to try next. Any help would be greatly appreciated.