1. Locate your 25-character product key found in your product package or confirmation e-mail. You must have a valid, activated Office 2010 product key to install and activate your downloaded software.
2. Go to www.office.com/backup
3. Click the Get backup button
11. Open Microsoft Office.
To open, click Windows Start, then point to All Programs , and then Microsoft Office, Microsoft Word (or other Office application).
Note: If you did not opt to have automatic activation during the setup process you will need to activate your software. If so, enter your Product Key when prompted and follow the on-screen instructions to activate Office.
A backup copy is available for the following Microsoft products from this site.
For DVD online store purchases, downloads, or product key questions, please contact Microsoft Online ESD Support
If your license designation is “PKC,” use of the software downloaded from this site is governed by the “Product Key Card” terms portion of the Microsoft Software License Terms and the first clause of that agreement is amended to read as follows:
These license terms are an agreement between Microsoft Corporation (or based on where you live, one of its affiliates) and you. Please read them. They apply to the software (i) which is downloaded from this site and (ii) which is named on the PRODUCT KEY CARD you have purchased.