It seems certain that the file association for docx has gone adrift from
Word - perhaps because you later installed a zip application that stole the
file association (docx is a compressed format). If repairing Office doesn't
fix it, then right click a docx file from Windows Explorer and select Open
With... Choose Winword.exe and check the box to always open with this
application.

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Graham Mayor - Word MVP
My web site www.gmayor.com
Word MVP web site http://word.mvps.org
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> Sorry the Subject line cut off, but I have Word 2007 and it still
> converts it to zip files when I open the document (.docx ) as an
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>> I have downloaded all updates and I can't open .docx files from email
>> attachments. This is stupid!