When searching for (.doc, .xls or pdf) files from the search window or from
an office application, most of the files found do not have applications
associated with them and cannot be opened by double clicking on the file
shown in the search window. The file can be opened by manually navigating to
the file in windows explorer. There seems to be random files that can be
opened this way, but I can find no reason or pattern to this problem.
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Mark