COEIT recommends the 64-bit version of Office

There are two versions of Office available to install: 32-bit and 64-bit. Which version is right for you depends on how you plan to use Office.The 64-bit version of Office has a few limitations, but is most often the right choice, especially when:

  • You work with extremely large data sets, like enterprise-scale Excel workbooks with complex calculations, many PivotTables, connections to external databases, PowerPivot, PowerMap, or PowerView. The 64-bit version of Office may perform better for you.
  • You work with extremely large pictures, videos, or animations in PowerPoint. The 64-bit version of Office may be better suited to handle these complex slide decks.
  • You work with extremely large Word documents. The 64-bit version of Office may be better suited to handle Word documents with large tables, graphics, or other objects.
  • You’re working with files over 2GB in Project 2013, especially if the project has many subprojects.
  • You want to keep the 64-bit version of Office that you’re already using. The 32-bit and 64-bit versions of Office programs are not compatible, so you cannot install both on the same computer.
  • You’re developing in-house Office solutions, like add-ins or document-level customizations.

If none of these situations apply to you, the 32-bit version of Office is probably a decent choice.

Ready to install?

To install 64-bit Office:

To install 32-bit Office:

NOTE   If you decide to switch from 32-bit Office to 64-bit Office, you need to uninstall the 32-bit version first, and then you can install the 64-bit version.

Limitations of the 64-bit version of Office

The 64-bit version of Office may perform better in some cases, but there are limitations:

  • Solutions using ActiveX controls library, ComCtl controls won’t work.
  • Third-party ActiveX controls and add-ins won’t work.
  • Visual Basic for Applications (VBA) that contain Declare statements won’t work in the 64-bit version of Office without being updated.
  • Compiled Access databases, like .MDE and .ACCDE files, won’t work unless they’re specifically written for the 64-bit version of Office.
  • In SharePoint, the list view won’t be available.

Which version of Office do I have?

Here’s how to look up your Office version:

  • With an Office 2013 program open, choose File >Account, and then choose About [program name](like About Word). The full version name is listed at the top.Office version number
  • With an Office 2010 program open, choose File >Help. The full version name is listed under About Microsoft [program name] (like About Microsoft Word):Office version number