hi
based on your limited explanation, i am assuming that you are trying to open
excel files from the desktop.
can you open the file from excel ie file>open? if so, we can assume that
excel is not corrupted and excel is not the problem.\
your link(s) may have gotten corrupted which is a windows problem.
see this link. http://answers.yahoo.com/question/index?qid=20070613225849AAaW7Uw