How Many Computers Can I Install Windows 7 On?
If you purchase one (1) Windows 7 edition, you may install and activate it on just one (1) computer. If you are so inclined, consider Microsoft Windows 7 Home Premium Upgrade Family Pack (3-User) for installation on up to three (3) computers in your household.
All Microsoft Windows operating systems are licensed for one computer only. The only exception is Volume Licensing and that package requires a minimum purchase of five (5) licenses.
The key which can be used with either 32 or 64 bit Windows 7 is only intended for use with 1 of the disk. You cannot use it to install both. 1 license, 1 installation, so choose wisely. If you want to install Windows 7 32 bit on another partition or another computer, you will need to purchase an additional license