A question we often hear is how many computers can I install with my Microsoft Office license. Here is the official word from the Microsoft website:
How many licenses /installations do Office Product Key Cards allow?
Each Product Key Card allows one user to activate one Office 2010 suite on one preloaded PC.
How many licenses /installations are allowed with the traditional Office discs version?
The number of installations will vary depending on the Office suite purchased. The disc version of Office Home and Student 2010 allows a user to install one copy of the software on up to three PCs in a single household for non-commercial use. (Office Home and Student 2010 cannot be used for any commercial, non-profit or revenue generating activity or by any governmental organization.) The disc version of Office Home and Business 2010 and Office Professional 2010 allows one user to install one copy on one PC and a second copy on his/her portable device such as a laptop.
Can I install an Office Product Key Card on more than one PC?
No. The Office Product Key Card can only be installed on one PC. If you ever need to reinstall Office you can do so on the same PC on which Office was originally installed.
While disc versions may be a little bit more expensive they provide a great deal more flexibility. You can replace a computer and move the license and it gives you rights to install it on up to two machines at the same time.