A. There aren’t separate keys for 32- and 64-bit Windows. If you have a key for a certain edition of Windows, you can activate either architecture. For example, if I have a key for Windows 7 Ultimate, I can use it to activate either a 32- or 64-bit instance of Windows 7 Ultimate.
- Q. If I'm running a 64-bit version of Windows, do I need 64-bit versions of all my applications? Or do I need to use a virtual machine (VM) to run a 32-bit OS?
- Windows 7 Upgrade Scenario 2: Upgrade from 32-bit Windows Vista/XP to 64-bit Windows 7
- Q. Does Windows Virtual PC in Windows 7 support 64-bit guest OSs?
- Q. Why are 64-bit domain controllers (DCs) better than 32-bit DCs?
Check out hundreds more useful Q&As like this in John Savill's FAQ for Windows. Also, watch instructional videos made by John at ITTV.net.