Topic Last Modified: 2012-05-08
When you use Microsoft Office Professional Plus 2010 with Microsoft Office 365, you can edit and review Microsoft Office files virtually anywhere you can use your computer, mobile device, or web browser. For more information, see Office Professional Plus for Office 365 Overview.
Before downloading and installing Office Professional Plus, make sure you understand these key issues:
When you install Office Professional Plus, any version of Office already on your computer is uninstalled.
Important: Make sure that you have both the installation discs and product keys for your current version of Office before installing Office Professional Plus. These are required if you want to revert back to your previous Office installation. See Uninstall Office Professional Plus.
We recommend that you use the default installation of Office Professional Plus. We do not recommend installing more than one version of Office on the same computer. For more information about installing different versions of Office, see Information about how to use Office 2010 suites and programs on a computer that is running another version of Office.
Microsoft Office Professional Plus installs the 32-bit version of Office Professional Plus by default, even if your computer is running the 64-bit edition of Windows. If you are unsure which version of Office Professional Plus you should install, see Choose the 32-bit or 64-bit version of Microsoft Office.
- Watch the video about preparing to install Office (2:30)
The Office Professional Plus download is approximately 650 megabytes (MB). Download times vary based on the bandwidth available to you.
To install Office Professional Plus, follow these steps:
Sign in to Office 365 with your user ID.
On the Downloads page, under Install Microsoft Office Professional Plus, select your Language and Version, click Install, and follow the instructions. Note the following regarding your choice of installation:
We recommend that you accept the default installation and upgrade all Office programs. To do this, click Install Now.
If you do not want to upgrade all Office programs to Office Professional Plus, click Customize. On the Installation Options tab, select the programs that you want to upgrade, and then click Install Now.
- We recommend that you accept the default installation and upgrade all Office programs. To do this, click Install Now.
When the installation is finished, click Continue Online. You are prompted to install the Microsoft Online Services Sign-in Assistant . Click Accept and Install.
Type your user ID and password to verify your subscription, and then click Sign in.
After your subscription is verified, click Close.
Be sure to turn on automatic updates in Windows Update to get any updates for Office Professional Plus.
If you decide to revert back to your previous version of Office, you must first uninstall Office Professional Plus. To do this, follow these steps:
Open the Control Panel.
Depending on the operating system that is installed on your computer, click either Add or Remove Programs or Programs and Features.
In the list of installed programs, click Microsoft Office Professional Plus 2010, and then click Uninstall.
After you have uninstalled Office Professional Plus, you can install your previous version of Office.
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