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QUESTION
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How do I tell which edition (32 bit / x86 or 64 bit / x64) of Microsoft Office I have installed?
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ANSWER
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From any Microsoft Office application, select File, Help
On the right side, you will see a version number in the following format:
14.0.####.#### (##- bit)
If the application version number ends with “(32-bit)”, you are running the 32 bit or x86 version.
If the application version number is followed by “(64-bit)”, you are running the 64 bit or x64 version.
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EXAMPLES
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APPLIES TO / KEY WORDS
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REF
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http://www.anysitesupport.com/do-i-have-microsoft-office-32bit-or-64bit-installed/
http://anySiteHosting.com