Article ID: 2269468 - View products that this article applies to.
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:
You cannot install the 64-bit version of Office 2010 because you have 32-bit Office products installed. These 32-bit products are not supported with 64-bit installations:
If you want to install 64-bit Office 2010, you must uninstall all 32-bit Office products first, and then run setup.exe in the x64 folder. If you want to install 32-bit Office 2010, close this Setup program, and then either go to the x86 folder at the root of your CD or DVD and run setup.exe, or get the 32-bit Office 2010 from the same place you purchased 64-bit Office 2010.
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.
(http://support.microsoft.com/kb/290301/ )How to uninstall or remove Microsoft Office 2010 suites
(http://support.microsoft.com/kb/928218/ )How to uninstall or remove Microsoft Office 2007 suites
(http://support.microsoft.com/kb/2639197/ )How to uninstall or remove Microsoft Office 2003 suites
You can also use the following instructions to remove a single component.
Windows Vista or Windows 7
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 UninstallYou 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 OfficeWe 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:
Choose the 32-bit or 64-bit version of Microsoft OfficeMicrosoft 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.
64-bit editions of Office 2010
Compatibility Between the 32-bit and 64-bit Versions of Office 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
32-bit versions of Microsoft Office 2010 individual products
32-bit versions of Microsoft Office 2010 components
2007 Microsoft Office products and components
2007 Microsoft Office suites
2007 Microsoft Office individual products
2007 Microsoft Office components
Microsoft Office 2003 products and components
Microsoft Office 2003 suites
Microsoft Office 2003 individual products
Microsoft Office 2003 components
Microsoft Office XP products and components
Microsoft Office XP suites
Microsoft Office individual products
Microsoft Office XP components
Article ID: 2269468 - Last Review: March 14, 2012 - Revision: 3.0