You can install Office 2010 from a disc or by downloading it. Because of potential backward compatibility issues the default installed version is 32-bit. However, if the 64-bit version is a better choice, follow the 64-bit installation procedure in this article.
If you want to do a custom install or uninstall where you select only some apps, see the section below Install or remove individual Office programs or components.
What you need to know before installing 64-bit Office:
With Office 2010 you can install specific Office apps, or install specific Office components (features).
If you only want to install certain programs from your Office suite - for example, you have Office Home and Business and want to install Word, Excel, PowerPoint and Outlook but not OneNote – you can choose a custom installation during setup.
When you first try to use a feature that is not yet installed, Office usually installs the feature automatically.
If the feature that you want is not installed automatically, do the following: