Windows 7 software license terms are located on your PC at c: \windows\system32\license.rtf:
2. INSTALLATION AND USE RIGHTS.
a. One Copy per Computer. You may install one copy of the software on one computer. That computer is the “licensed computer.”
b. Licensed Computer. You may use the software on up to two processors on the licensed computer at one time. Unless otherwise provided in these license terms, you may not use the software on any other computer.
c. Number of Users. Unless otherwise provided in these license terms, only one user may use the software at a time.
For versions of Win7 that include Remote Desktop or include Remote Assistance or those using similar technologies:
g. Remote Access Technologies. You may access and use the software installed on the licensed computer remotely from another device using remote access technologies as follows.
• Remote Desktop. The single primary user of the licensed computer may access a session from any other device using Remote Desktop or similar technologies. A “session” means the experience of interacting with the software, directly or indirectly, through any combination of input, output and display peripherals. Other users may access a session from any device using these technologies, if the remote device is separately licensed to run the software.
• Other Access Technologies. You may use Remote Assistance or similar technologies to share an active session.
Interesting wording in the second half of that second bolded paragraph.