Originally Posted by CWatkinsNash
From the 2010 MSLT:
So you can install it on up to three computers, but you're not supposed to use it to write books that you intend to sell, or for marketing activities.
Edit to add: Activation - I don't know about this version, but the regular 2010 version has an offline activation option.
I hasten to add, that at http://portableapps.com/apps/office
, you can get a FREE version of either OpenOffice or LibreOffice that is designed to install on a thumb/flash drive.
Edit: I notice you can also get a portable version of Sigil ebook editor.