Choose the 64-bit or 32-bit version of Office 2016

By default Office 2016 installs the 32-bit version of Office. However, since many new personal computers are running 64-bit versions of Windows, it is important to decide whether to install the 64-bit version of Office or continue to use 32-bit. Which version is right for you depends on how you plan to use Office.

If you already know which version you want to install, see the steps in the section Ready to install?

Reasons to choose the 64-bit version

Computers running 64-bit versions of Windows generally have more resources such as processing power and memory, than their 32-bit predecessors. Also, 64-bit applications can access more memory than 32-bit applications (up to 18.4 million Petabytes). Therefore, if your scenarios include large files and/or working with large data sets and your computer is running 64-bit version of Windows, 64-bit is the right choice when:

  • You’re working with large data sets, like enterprise-scale Excel workbooks with complex calculations, many PivotTables, data connections to external databases, PowerPivot, 3D Map, PowerView, or Get & Transform. The 64-bit version of Office may perform better in these cases. See, Excel specifications and limits, Data Model specification and limits, and Memory usage in the 32-bit edition of Excel.

  • You’re working 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’re working with files over 2GB in Project, especially if the project has many sub-projects.

  • Your organization requires Hardware Data Execution Prevention (DEP) for Office applications. DEP is a set of hardware and software technologies that some organizations use to enhance security. For 64-bit installs, DEP will always be enforced while on 32-bit installs, you’ll need to configure DEP by using Group Policy settings.

  • You’re developing in-house Office solutions, like add-ins or document-level customizations. Using the 64-bit version of Office will allow you to deliver a 64-bit version of those solutions as well as a 32-bit version. In-house Office solution developers should have access to the 64-bit Office 2016 for testing and updating these solutions.

Reasons to choose the 32-bit version

If your computer is running the 32-bit version of Windows you must install the 32-bit version of Office.

Tip: In addition to providing support for 32-bit versions of Windows, the 32-bit version of Office is supported on computers running the 64-bit versions of Windows.

IT Professionals and developers in particular, should also review the following situations where the 32-bit version of Office is still the best choice for yourself or your organization.

  • You have 32-bit COM Add-ins with no 64-bit alternative. You can continue to run 32-bit COM add-ins in 32-bit Office on 64-bit Windows. You can also try contacting the COM Add-in vendor and request a 64-bit version.

  • You use 32-bit controls with no 64-bit alternative. You can continue to run 32-bit controls in 32-bit Office like Microsoft Windows Common Controls (Mscomctl.ocx, comctl.ocx), or any existing 3rd-party 32-bit controls.

  • Your VBA code uses Declare statements Most VBA code doesn’t need to change when using in 64-bit or 32-bit, unless you use Declare Statements to call Windows API using 32-bit data types like long, for pointers and handles. In most cases, adding PtrSafe to the Declare and replacing long with LongPtr will make the Declare statement compatible with both 32- and 64-bit, however this may not be possible in rare cases where there is no 64-bit API to Declare.For more information about what VBA changes are needed to make it run on 64-bit Office, see 64-Bit Visual Basic for Applications Overview.

  • You have 32-bit MAPI applications for Outlook. With a growing number of 64-bit Outlook customers, rebuilding 32-bit MAPI applications, add-ins, or macros for 64-bit Outlook is the recommended option, but if needed you can continue to run them with 32-bit Outlook only, as well. If you want to learn about preparing Outlook applications for both 32-bit and 64-bit platforms, see Building MAPI Applications on 32-Bit and 64-Bit Platforms and the Outlook MAPI Reference.

  • You’re activating a 32-bit OLE server or object. You can continue to run your 32-bit OLE Server application with a 32-bit version of Office installed.

  • You using SharePoint Server 2010 and you need the Edit in Datasheet view. You can continue to use the Edit in Datasheet view functionality in SharePoint Server 2010 with 32-bit Office client.

  • You need 32-bit Microsoft Access .mde, .ade, and .accde database files. While you can recompile 32-bit .mde, .ade, and .accde files to make them 64-bit compatible, you can continue to run 32-bit .mde, .ade, and .accde files in 32-bit Access.

  • You require Legacy Equation Editor or WLL (Word Add-in libraries) files in Word. You can continue to use Legacy Word Equation Editor and run WLL files in 32-bit Word.

  • You have an old embedded media file in your PowerPoint presentation with no available 64-bit codec.

Ready to install?

Important: before you install

You can’t install 64-bit versions of Office side-by-side with 32-bit versions Office, or 32-bit standalone Office applications, such as the 32-bit version of Visio or Project. Likewise, you can't install 32-bit side-by-side with 64-bit.

For example, if you previously installed the 32-bit version of Office 2013, and you want to install the 64-bit version of Office 2016, you must first uninstall the 32-bit version. See Uninstall Office 2016, Office 2013, or Office 365 from a PC for those steps.

Attempting to install two different versions will cause the following error, “Office (64-bit or 32-bit) couldn’t be installed” when trying to install.

Select the version you want to install

By default, Office installs the 32-bit version. If that’s the version you want to install, follow the steps in Install Office on your PC or Mac.

How you install Office depends on whether your Office product is part of an Office for home or Office for business plan. See Office for home and Office for business plans for a list of products under each plan.

Select your plan from the drop-down list below to see step-by-step 64-bit installation instructions for your Office product.

If this is a new copy of Office and you haven't redeemed your product key (if one came with your product) and associated it with a Microsoft account, see Redeem your product key and associate a Microsoft account with Office before completing the steps below.

Begin installing Office
  1. Go to www.office.com/myaccount. If you're not already signed in with the Microsoft account associated with your copy of Office do that now. If you're signed in with a different account, sign out of that and then sign in again with the correct Microsoft account.

    Screenshot of Microsoft account sign in page

    Tip: If your sign in was unsuccessful try signing in again with the correct account, or see "This is the right place to install and re-install Office" for a list of options, including what to try if you can't remember your Microsoft account.

  2. Note: If you have an Office 365 subscription and your screen looks like the one below, you'll need to select Install > first.

    For Office 365 plans, select Install > on the My Office Account home page

    Select Language and install options. (For an Office 2013 install, select Additional install options and then skip to step 4).

    Language and install options for Office 365
  3. On the Language and install options page, select the link, Additional install options.

    On the Language install options page, select the link Additional install options
  4. In the Other versions of Office section, select Office - 64-bit from the drop-down list, then select Install.

    Select Office - 64-bit from the dropdown list

    Note: If you get a message that says, “Stop, you should wait to install Office 2016” it means Office detected a compatibility issue with something else installed on your computer. Select the Learn why link in the error message, or see the Troubleshooting section below.

  5. Depending on your browser, go to the install pop up that appears at the bottom of the page and click Run (in Internet Explorer), Setup (in Chrome), or Save File (in Firefox).

    Tip: If you're using Edge, first click Save, and then click Run.

    Screenshot of browser options: in Internet Explorer click Run, in Chrome click Setup, in Firefox click Save File

    If you see the User Account Control prompt that says, Do you want to allow this app to make changes to your device? Click Yes.

    The install begins.

    Window showing progression of Office install
  6. Your install is finished when you see the phrase, "You're all set! Office is installed now" and an animation plays to show you where to find Office applications on your computer. Follow the instructions in the window, for example Click Start > All Apps to see where your apps are, and select Close.

    Office is installed now. Select Close
  7. Start using an Office application right away by opening any app such as Word or Excel. In most cases, Office is activated once you start an application and after you agree to the License terms by clicking Accept.

    Accept the License Agreement terms by clicking Accept
  8. Office might activate automatically. If you see the Microsoft Office Activation Wizard, follow the prompts to activate Office. If you need help, see Activate Office 365, Office 2016, or Office 2013.

    Shows the Microsoft Office Activation Wizard

Tip: Were these steps helpful? Please leave us a comment!

Troubleshooting

If Office seems to be taking a very long time to install, there could be a problem with your internet connection. For possible solutions, see Why is Office taking so long to install? You may also want to try installing Office using the Office 2016 offline installer.

I received an error message: If you got an error message while trying to install Office and it has a Learn More link, select it to get information for how to troubleshoot the problem. If there wasn't a link, see Troubleshoot installing Office and Office 365.

If your Install button is grayed out, see Install button doesn't install Office.

If you get a message that says, “Stop, you should wait to install Office 2016” it means Office detected a compatibility issue with something else you have installed. See one of the following help articles for more information:

Leave us a comment

Were these steps helpful? If so, please let us know at the bottom of this topic. If they weren't, and you're still having trouble installing Office, tell us what you were trying to do and where you had difficulties. We'll use your feedback to double-check our steps and provide additional information.

Note: If you're unable to sign in following the steps below you may be signing in to the wrong Office 365 service, see Where to sign in to Office 365.

  1. Sign in with your work or school account at http://portal.office.com/OLS/MySoftware.aspx.

    If you don't see Office listed, your plan probably doesn't include Office applications. If you know your plan includes Office, you may not have a license assigned, see What Office 365 product or license do I have? If Office is not listed ask your Office 365 administrator to assign a license to you.

  2. On the Office page, go to the version of Office you want to install. For example, your admin may have given you the option to install Office 2016 or Office 2013.

    If you have a choice, select which version of Office you want to install, select a language, and then select Install.

    Important: The process that installs Office 2016 also uninstalls all Office 2013 products. See "Stop, you should wait to install Office 2016" error or How do I reinstall Office 2013 after an Office 2016 upgrade.

  3. Select a Language, and then select Advanced > 64-bit before you choose Install.

    Select a language and then select Advanced Select 64-bit from the Version drop-down list
  4. Depending on your browser, go to the install pop-up that appears and click Run (in Internet Explorer) Setup (in Chrome), or Save File (in Firefox).

    Tip: If you're using Edge, first click Save, and then click Run.

    Screenshot of browser options: in Internet Explorer click Run, in Chrome click Setup, in Firefox click Save File

    If you see the User Account Control prompt that says, Do you want to allow this app to make changes to your device? Click Yes.

  5. The install begins.

    Window showing progression of Office install
  6. Your install of Office 2016 is finished when you see the phrase, You're all set! Office is installed now and an animation plays to show you where to find Office applications on your computer. Follow the instructions in the window, for example Click Start > All Apps to see where your apps are, and select Close.

    Office is installed now. Select Close
  7. Start using an Office application right away by opening any app such as Word or Excel. In most cases, Office is activated once you start an application and after you agree to the License terms by clicking Accept.

    Accept the License Agreement terms by clicking Accept

Leave us a comment

Were these steps helpful? If so, please let us know at the bottom of this topic. If they weren't, and you're still having trouble installing Office, tell us what you were trying to do and where you had difficulties. We'll use your feedback to double-check our steps and provide additional information.

See Also

Which Windows operating system am I running?

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