You receive the error message "You cannot install the 64-bit version of Office 2010 because you have 32-bit Office products installed"

When you try to install the 64-bit version of a Microsoft Office 2010 suite or the 64-bit version of a Microsoft Office 2010 product, you receive the following error message at the beginning of the installation process:


The placeholder <products> represents any version of Microsoft Office and also any component that you downloaded separately from the Microsoft Download Center that applies to Microsoft Office. See the "More Information" section for a list of these products.

The 64-bit version of Office 2010 is incompatible with the 32-bit version of Office 2010 products or with the 32-bit version of Office 2010 components that are listed in the "More Information" section.

Additionally, you cannot install 64-bit versions of Office 2010 products and 32-bit versions of Office 2010 products on the same computer. For example, if you install the 32-bit version of Microsoft Office Professional 2010 and then try to install the 64-bit version of Microsoft Project Professional 2010, you receive the error message that is mentioned in the "Symptoms" section.

To install the 64-bit version of Office 2010, you must uninstall the products that are listed in the error message. Note the products that are listed in the error message, and then follow these steps for your version of Windows. (The product names that appear in the error message are the same product names that appear in the Programs Control Panel that you will use to uninstall them.)

To remove an earlier version of Office, click one of the following article numbers to view the article in the Microsoft Knowledge Base.

Office 2010
2007 Office
Office 2003
You can also use the following instructions to remove a single component.

Windows Vista or Windows 7

1. While the error message is displayed on your screen, note the names of the products that are listed.
2. Click Start, and then click Control Panel.
3. Under Programs, click Uninstall a Program.
4. Locate one of the products that you noted in step 1, right-click the product name, and then select Uninstall.
5. Repeat step 3 until you have uninstalled all the products that you noted in step 1.

After you remove all previous 32-bit versions, you can try to install the 64-bit version of Office 2010.

Known issues with this resolution

Restart of your computer is requested during Uninstall

You may receive a message to restart your computer, depending on the product that you are uninstalling. When this message is displayed, you must restart the computer to finish the uninstallation process. If you do not restart your computer, you may receive different error messages when you try to install Office later.

Application compatibility and the 64-bit version of Office

We strongly recommend that customers use the 32-bit version of Office 2010 even on 64-bit versions of Windows because of application compatibility. If you have add-ins on your computer, especially if you sync your mobile phone together with Microsoft Outlook, check with the add-in manufacturer to see whether a 64-bit version of the add-in is available before you install the 64-bit version of Office 2010.

For more information about the differences between the 32-bit and 64-bit versions of Office 2010, visit the following websites:

Microsoft does provide 32-bit and 64-bit versions of the following components for Office 2010. You can install the 64-bit versions of these components to work with the 64-bit version of Office 2010.

• Microsoft Access Database Engine 2010
• Microsoft Access Runtime 2010

The following list includes those products that may be displayed in the error message and that must be removed in order to install the 64-bit version of Office 2010.

Microsoft Office 2010 products and components

32-bit versions of Microsoft Office 2010 suites

• Microsoft Office Home and Business 2010
• Microsoft Office Home and Student 2010
• Microsoft Office Standard 2010
• Microsoft Office Small Business Basics 2010
• Microsoft Office Professional 2010
• Microsoft Office Professional Plus 2010

32-bit versions of Microsoft Office 2010 individual products

• Microsoft Access 2010
• Microsoft Excel 2010
• Microsoft Office Groove 2010
• Microsoft InfoPath 2010
• Microsoft OneNote 2010
• Microsoft Outlook 2010
• Microsoft PowerPoint 2010
• Microsoft Project Standard 2010
• Microsoft Project Professional 2010
• Microsoft Publisher 2010
• Microsoft SharePoint Designer 2010
• Microsoft Visio Standard 2010
• Microsoft Visio Professional 2010
• Microsoft Visio Premium 2010

Note: Microsoft Office Groove 2010 may be displayed in the error message but is not listed among the programs in Control Panel. You must uninstall Microsoft SharePoint Workspace 2010 in Control Panel to remove Microsoft Office Groove 2010 from the error message.

32-bit versions of Microsoft Office 2010 components

• Microsoft Access Runtime 2010
• Microsoft Access Database Engine 2010

2007 Microsoft Office products and components

2007 Microsoft Office suites

• Microsoft Office Enterprise 2007
• Microsoft Office Home and Student 2007
• Microsoft Office Standard 2007
• Microsoft Office Professional 2007
• Microsoft Office Professional Plus 2007
• Microsoft Office Small Business 2007
• Microsoft Office Ultimate 2007
• Microsoft Office Basic 2007

2007 Microsoft Office individual products

• Microsoft Office Access 2007
• Microsoft Office Excel 2007
• Microsoft Office Groove 2007
• Microsoft Office InfoPath 2007
• Microsoft Office InterConnect 2007
• Microsoft Office OneNote 2007
• Microsoft Office Outlook 2007
• Microsoft Office PowerPoint 2007
• Microsoft Office Publisher 2007
• Microsoft Office Project Standard 2007
• Microsoft Office Project Professional 2007
• Microsoft Office SharePoint Designer 2007
• Microsoft Office Visio Professional 2007
• Microsoft Office Word 2007

2007 Microsoft Office components

• Compatibility Pack for the 2007 Office System
• Microsoft Office Access Database Engine 2007
• Microsoft Excel Viewer
• Microsoft PowerPoint Viewer
• Microsoft Office Proofing Kit 2007

Note: The Microsoft Office Access Database Engine 2007 is installed by the 2007 Office System Drivers: Data Connectivity Components download.

Microsoft Office 2003 products and components

Microsoft Office 2003 suites

• Microsoft Office Professional Edition 2003
• Microsoft Office Professional Enterprise Edition 2003
• Microsoft Office Small Business Edition 2003
• Microsoft Office Standard Edition 2003
• Microsoft Office Basic Edition 2003
• Microsoft Office Student and Teacher Edition 2003

Microsoft Office 2003 individual products

• Microsoft Office Access 2003
• Microsoft Office Excel 2003
• Microsoft Office FrontPage 2003
• Microsoft Office InfoPath 2003
• Microsoft Office OneNote 2003
• Microsoft Office Outlook 2003
• Microsoft Office Project Standard 2003
• Microsoft Office Project Professional 2003
• Microsoft Office PowerPoint 2003
• Microsoft Office Visio Standard 2003
• Microsoft Office Visio Professional 2003
• Microsoft Office Word 2003

Microsoft Office 2003 components

• Microsoft Office Excel Viewer 2003
• Microsoft Office PowerPoint Viewer 2003
• Microsoft Office Word Viewer 2003
• Microsoft Office 2003 Proofing Tools

Microsoft Office XP products and components

Microsoft Office XP suites

• Microsoft Office XP Professional with FrontPage
• Microsoft Office XP Developer
• Microsoft Office XP Professional Special
• Microsoft Office XP Standard

Microsoft Office individual products

• Microsoft Access 2002
• Microsoft Excel 2002
• Microsoft FrontPage 2002
• Microsoft Outlook 2002
• Microsoft PowerPoint 2002
• Microsoft Project Standard 2002
• Microsoft Project Professional 2002
• Microsoft Publisher 2002
• Microsoft Visio Standard 2002
• Microsoft Visio Professional 2002
• Microsoft Word 2002

Microsoft Office XP components

• Microsoft Excel 2002 Viewer
• Microsoft PowerPoint 2002 Viewer
• Microsoft Word 2002 Viewer