In the comments to an earlier post, TJ asks a question that I get frequently:
my sister got office ultimate 2007 and was wondering if i can install it on 2 computer?
The short answer is yes, but the longer answer is probably not in the way you think. The license for all versions of Office 2007 except Home and Student edition are very clear. (To view your license, open any Ribbon-based Office program, click the Office button, click Word Options, select the Resources tab, and click About <program_name>. For Outlook, click Help, About Microsoft Outlook. In the About dialog box, you’ll see a View the Microsoft Software License terms link.)
For any retail edition of Office 2007, the details are in sections 1 and 2:
1. OVERVIEW. These license terms permit installation and use of one copy of the software on one device, along with other rights, all as described below.
2. INSTALLATION AND USE RIGHTS. Before you use the software under a license, you must assign that license to one device. That device is the “licensed device.” A hardware partition or blade is considered to be a separate device.
a. Licensed Device. You may install and use one copy of the software on the licensed device.
b. Portable Device. You may install another copy on a portable device for use by the single primary user of the licensed device.
This is actually a pretty customer-friendly policy, in my opinion. If you have a desktop and a portable PC (or two portable PCs), you can install and use the software on both devices. But those terms apply only if they are your computers, where you are the "single primary user." Under those rules, installing your sister’s copy of Office 2007 Ultimate on your computer would be a violation of the license terms.
For an OEM copy of any Office 2007 edition, the option to install on a second device is not available.
Office 2007 Home and Student Edition has a separate license policy, which allows the software to be installed and used on up to three computers within a single home for noncommercial use. If you and your sister live in the same household and you are not using Office for business purposes, she could get that edition and you could indeed install and activate the software in full compliance with the license agreement.
Update: In the comments to this post, Serdar has this follow-up:
One tough question I get asked a lot which I have no answer to: What constitutes "business use"? If someone has a home business or is self-employed, do they need to buy the business editions of Office?
The relevant portion of the license agreement for Office 2007 Home and Student (section 2a) reads as follows:
You may install one copy of the software on three licensed devices in your household for use by people who reside there. The software is not licensed for use in any commercial, non-profit, or revenue-generating business activities.
If you are self-employed, the license terms clearly do not allow you to use Home and Student Edition on your work computer. For that, you need to buy any other edition. [Update 2: Except an Academic edition, as Peter Ortner notes, correctly, in the comments.] If you have a home business that is truly a business, then the same applies. Everyone has to read the agreement and decide for themselves how it applies. My personal opinion, not given as legal advice, is that the reasonableness test would say you could use this for volunteer tasks on behalf of a non-profit (as long as you weren’t involved in the day-to-day running of the organization). And I think the same test would say if you occasionally sell something on eBay or take an occasional writing job for which you get paid, that’s OK as long as you don’t consider it a business but a sideline or hobby.
Frankly, I’m happy that the license agreement doesn’t try to spell out this line in excruciating detail and leaves it up to the customer to make a good-faith decision about abiding by the license agreement.