Hi Peter,

There aren't 64 bit versions of the MS Office desktop products. This is is a MS article on Office support in 64 bit Windows
versions:
http://support.microsoft.com/kb/895361/en-us?FR=1

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<<"Peter Hartley" <PeterHartley@discussions.microsoft.com> wrote in message
news:7934B761-54E0-4FCD-942B-91259B59C0CF@microsoft.com...
My 64-bit system (AMD 3200Hz; 2Gb RAM) prevously running on Windows 2000 has
just been upgraded to Vista 64 & I need new Office software to go with it (I
think). I looked at MS Office Home & Student 2007 but cannot determine
whether that product is available in 64-bit format (or does it matter?)
In the 'system requirements' section for the trial download version it is
stipulated ONLY to use a 32-bit browser........ >>
--

Bob Buckland ?:-)
MS Office System Products MVP

*Courtesy is not expensive and can pay big dividends*