To legally use Microsoft Office, you must agree to the Microsoft End User License Agreement, or EULA. The specific terms of the EULA vary depending on which version of Office you've purchased and whether you purchased it from a store or it came preinstalled on a new computer. In order to transfer your Microsoft Office license to another computer or user, you must adhere to the terms of the EULA for your version of Office.
Visit Microsoft's website and read the EULA for your version of Office. A link to Microsoft's software licensing download page is listed below. Note that if Office came preinstalled on your computer by the manufacturer, you cannot transfer the license to another computer, but you can transfer the license to another user unless you transfer it and the computer together.
Uninstall Microsoft Office from your computer using the "Uninstall a Program" wizard located in the Control Panel. In Windows 7, access "Uninstall a Program" by clicking "Start," choosing "Control Panel," then selecting "Uninstall a Program."
Give your Microsoft Office installation disk and its packaging and documentation to its new owner if you're transferring a retail version of Office to another person.
Reinstall Microsoft Office on a new computer if you are transferring your retail copy of Office to a new computer.
Activate your copy of Office on the new computer when prompted by entering the Product Key. If you run into problems trying to activate your license online, this may be due to the license transfer. Choose "Activate by Phone" and explain your situation to the operator. The operator will help you activate Office.