MSDNAA: Activating Windows 7 on Multiple Computers
MSDNAA contact information for activating multiple copies of Windows 7.
Despite the information presented on the MSDNAA Frequently Asked Questions, CAE does nothing more than provide the URL on the My Account pages and the authentication that you have a CAE account. CAE does not keep media, nor license keys, so we cannot give or approve multiple installations. Please visit the Request Customer Support link on UW's MSDNAA site for further assistance.
Additionally, if you had not activated the old download of Windows 7, you may still download new ones without needing to go through additional procedures.