Hi B-W-Design, could you describe a bit more about what you are doing when that error is triggered?

I mean does it happen when you do some particular steps, like when you click on one particular button, or what?

If your Internet Explorer installation has gotten messed up somehow, it could maybe cause some similar issues to that. You might try hitting the button which will reset IE settings, which is described in this blog post:
http://blogs.msdn.com/ie/archive/2006/06/12/628499.aspx

That could help if your registry has gotten mangled or something like that.

- Michael