Thank you for the quick response. That was too easy...Yes issue has been resolved after following your suggestion.
Moved the specified files to a safe location on the same drive as XP11. Then ran the XP installer directing it to current installation which happens to be drive D:/ in my case. Once completed, started XP and no more errors. Apparently, one or two of those files were missing or corrupt but now issue has been resolved. Thank you again and Happy New Year.