http://www.microsoft.com/about.../useterms/default.aspx
http://download.microsoft.com/...-9f69-5811ffdcd774.pdf
MICROSOFT SOFTWARE LICENSE TERMS
WINDOWS VISTA HOME BASIC SERVICE PACK 1
WINDOWS VISTA HOME PREMIUM SERVICE PACK 1
WINDOWS VISTA ULTIMATE SERVICE PACK 1
...
17. REASSIGN TO ANOTHER DEVICE.
a. Software Other than Windows Anytime Upgrade. You may uninstall the software and
install it on another device for your use. You may not do so to share this license between
devices.
b. Windows Anytime Upgrade Software. The first user of the software may reassign the license
to another device, but only if the license terms of the software you upgraded from allows
reassignment.
18. TRANSFER TO A THIRD PARTY.
a. Software Other Than Windows Anytime Upgrade. The first user of the software may make
a one time transfer of the software, and this agreement, directly to a third party. The first user
must uninstall the software before transferring it separately from the device. The first user may
not retain any copies.
b. Windows Anytime Upgrade Software. You may transfer the software directly to a third party
only with the licensed device. You may not keep any copies of the software or any earlier
version.
c. Other Requirements. Before any permitted transfer, the other party must agree that this
agreement applies to the transfer and use of the software. The transfer must include the proof of
license.