UI entirely broken under Win7 Pro 64bit IE8

UI entirely broken under Win7 Pro 64bit IE8

Hi,

I'm running Win7 Pro 64bit.  I was using the accordion control and everything was looking great (in FF & Chrome) until I decided to check it out under IE8 and found that it doesn't render at all, the elements are just displayed as regular HTML.

Before I started ripping out code, I decided to check out http://jqueryui.com/ site in IE, and none of the UI controls work at all!  I've tried adjusting IE security settings but still no love.  I have all the latest MS updates.

Has anyone encountered this? 

BTW, I checked it on another system running 64bit win7 Home Premium and it DOES WORK - what am I missing??

Thanks for your time-

Carmen