If youre concerned, check your current version of Office before installing the new one. For more information, see Patching and Upgrades. Office ( 64 - bit ) couldnt be installed error when you install Office 2013 or Office 365. 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. For more information, refer to this Microsoft webpage: Support is ending for some versions of. A package cannot be marked as supporting both Intel64 and x64 platforms, a. A package cannot be marked as supporting both 32 - bit and 64 - bit platforms, the Template Summary property values of "Intel, x64" or "Intel, Intel64" are invalid. If the application installs coexisting 32 - bit and 64 - bit versions of a component, verify that the application shares.ini file information correctly. This may be necessary to have 32 - bit and 64 - bit copies of the same application coexist. In order to optimize the computer's performance, the bit count of the operating system that is installed on the computer should match the bit count of the computer itself. Generally, a computer's bit count indicates how much data it can process, the speed with which it can process the data, and the maximum memory capacity. If a 64 - bit ODBC Driver Manager is to be installed, the component that carries it should be named ODBCD riverManager64. Use the AppSearch Table and AppSearch Action to do optional searches of the registry for existing 64 - bit components. Template Summary property if the package is to be run on an Intel64 processor. Verify that the application only calls 32 - bit services that run as executables. Yes No Somewhat Tell us what we can do to improve the article Thanks! 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. If youre an administrator who is deploying Office, we have more technical details available on TechNet. 64 - Bit Custom Actions Show: Inherited Protected. Go to What version of Office am I using? To disable Registry Reflection for registry keys that are affected by a particular component, set the msidbComponentAttributesDisableRegistryReflection bit in the Attributes field of the Component table. 32 - bit third-party ActiveX controls and add-ins wont work. Applications should not call 32 - bit services that run in DLLs. For more help, try searching for what you need at the top of the page. Your feedback will help us improve the support experience. The Windows Installer sets these properties to the current numeric processor level of the computer and leaves the Intel64 Property undefined if this is not an Itanium-based processor. You can't mix 32 - bit and 64 - bit versions of Office. Windows Installer sets this property to the 64 - bit Windows version and leaves VersionNT64 undefined if the operating system is not 64 - bit Windows. If youre a business user, sign in to the Office 365 portal and choose Install. You are currently using a 64 - bit operating system. If this bit is set, the Windows Installer calls the RegDisableReflectionKey function on each key that is being accessed by the component. Use optional conditional statements that check the numeric processor level of the computer by referencing the Intel64 or Msix64 property. Verify that the application uses the correct GUID when referencing a 64 - bit component. Compiled Access databases, like.MDE and.ACCDE files, wont work unless theyre specifically written for the 64 - bit version of Office. To install 64 - bit Office: If youre a home user, sign in to your My Account page and choose Install Language and install options Additional install options Office (. Enter "x64" if the package is to be run on a 64 - bit extended processor. This bit is available with Windows Installer version 4.0. If you have a version of 32 - bit or 64 - bit Office in your computer and you want to install Office 365, Office 2016, Office 2013, or an. To search for existing 64 - bit components, include the msidbLocatorType64bit bit in the Type column of the RegLocator Table. In SharePoint 2010 or earlier, the datasheet view wont be available because this view uses an ActiveX control. Visual Basic for Applications (VBA) that contain Declare statements wont work in the 64 - bit version of Office without being updated. Article ID: Last Review: - Revision: 15.1. Verify that the application only applies 32 - bit patches to 32 - bit binaries and 64 - bit patches to 64 - bit binaries. Or, from a disc, go to the x64 folder and double-click Setup. Indicate in the Template Summary property of the package summary information stream that this is a 64 - bit package. The ODBC Driver Manager must be authored in the installer package and a component named ODBCD riverManager64 must be included. Consider future upgrade scenarios for both 32 - bit and 64 - bit versions and maintain upgrade codes. For example, if your computer has a 32 - bit version of Office 2010 and you want to install Office 2013, you have to install the 32 - bit version. The manager will be installed if necessary. If there are 32 - bit and 64 - bit versions of a specific component, these should have different component ID GUID s. When using a bootstrapping application to install a 64 - bit Windows Installer Package, compile the bootstrapping application as a 64 - bit application.