Script errors on I.E. 11, after updates

   I think these began after the last set of updates.

   I Randomly get different types of script errors when navigating to a new page.    It is NOT reproducible, as subsequent attempts to the same web pages do not always get an error,  or if it does - it's not the same error.     Whether I click the 'continue running scripts' YES or NO,  may cause a different error, or it may not..     Clicking past however many errors does NOT seem to affect the page which eventually displays.     At times,  it seems to disappear for a few pages, then it's back.

   I downloaded a replacement I.E. 11,  but it tells me that a 'newer' one exists and will not replace it.

   I'm willing to try a replacement,  but how do I clear the existing I.E.?    Or what updates can I remove that may correct this and/or allow me to replace this annoying 'cry wolf' copy?

Thanks,

Bob