How do I tell if my computer can run a 64-bit version of Windows?

How do I tell if my computer can run a 64-bit version of Windows?

To run a 64-bit version of Windows, your computer must have a 64-bit-capable processor. To find out if your processor is 64-bit-capable, do the following:
  1. Open Performance Information and Tools by clicking the Start button Picture of the Start button, clickingControl Panel, clicking System and Maintenance, and then clickingPerformance Information and Tools.
  2. Click View and print details.
  3. In the System section, you can see what type of operating system you're currently running under System type. Under 64-bit capable, you can see whether you can run a 64-bit version of Windows. (If your computer is already running a 64-bit version of Windows, you won't see the 64-bit capable listing.)