You can read the End User License Agreement that applies to your copy of
Office by starting Word, then clicking on Help | Microsoft Word Help |
Contents tab | click on the + next to "Microsoft Word Help" to expand
the topic, and select "End User License Agreement" from the list of
topics. In the EULA, there will be a section entitled "General License
Grant to Install and Use" that says how many computers (and what types
of computers) you can install your copy of Office on.