Internet Explorer and Javascript Issue

[Mr. Tech]

This is the thrid forum I've asked this at... No one can seem to help me... This is what happened:

I use a program called http://www.fckeditor.net/ to edit my clients websites via CMS. All of a sudden one day the editor controls stopped working... No errors, no editor controls.

I thought it was just FCK Editor that was stuffed but when I went into Windows Update, it just opens up in IE, stops loading and shows a white screen...

I tried another browser called Avant Browser... Same thing happened... I tried installing the IE 7 Beta but ocne again neither is working...

So I'm guessing there is something wrogn with JavaScript. Any ideas what the problem might be?