Broken IE6 – will not play videos

How does one fix a broken IE6. It cannot be uninstalled. Displays the following error:
IE Script error. line 169,char 5, Object doesn’t support this property or method; code 0; url: http://video.msn.com/video/hv/hv.htm Do you want to continue running scripts on this page.

Doesn’t matter if its msn website or others. Won’t play Windows Media videos. Windows media doesn’t work with firefox.