My EULA appears that you can install it on a second computer Excerpt below:
Additional Installation. Except with regard to Educational Institutional, Student and Evaluation Versions only, You may Install and Access a second copy of the Software on the hard disk of a second Computer owned by You or under Your control provided that:
(i) the original and second copies are used only by the same person;
(ii) the second copy is Installed and Accessed only on either (a) with respect to Network Versions, a redundant server that makes the Software available for use only when Your primary server on which the active Software copy is Installed becomes inoperable, or (b) a notebook computer or other non-server computer away from Your usual work location for the purpose of enabling You to perform work while away from Your usual work location;
(iii) only one of the Software copies is Accessed at any one time