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Choose the 32 bit or 64 bit version of Office

Choose the 32 bit or 64 bit version of Office

The 32-bit version of Office 2010 is the recommended option for most people, because it prevents potential compatibility issues with other 32-bit applications, specifically third-party add-ins that are available only for 32-bit operating systems.

Applies to:  Office 2010 | Office 2013 | Office 365 ProPlus

Source:
office.microsoft.com
technet.microsoft.com

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