SueNeedsHelp

In the volumous User Agreement, most software packages state you are allowed to install one additonal copy of the software on a portable computer (laptop). However, it's best to check for your specific software version...

 

The retail version of MS Office allows you to install on a desktop and a portable computer.  The OEM version (if you got office with your computer from Dell for instance) typically does not allow this, and it only supposed to be installed on the computer it was purchased with.

You could run it remotely, since it is not physically installed on the second machine, but this would seem to be a "gray area".