COEIT recommends the 64-bit version of Office
- 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:
- Sign in to the Office 365 portal. Choose Advanced > 64-bit > Install.
To install 32-bit Office:
- Sign in to the Office 365 portal and choose Install.
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.
- With an Office 2010 program open, choose File >Help. The full version name is listed under About Microsoft [program name] (like About Microsoft Word):