How do I determine if I have a 64-bit or 32-bit CPU?

32-bit or 64-bit Windows

Computer CPUIf you're wanting to determine the version of Windows your computer is running follow the steps below for your version of Windows. Keep in mind that a 64-bit processor can be using either 32-bit or 64-bit version of Windows and that a 32-bit processor can only use a 32-bit version of Windows.

Windows Vista, 7, and 8 users
Windows XP users

Windows Vista, 7, and 8 users

  1. Press and Hold the Windows Key and the Pause key or open the System and Security, System section in Control panel.
  2. In the System window by System type you'll have 32-bit Operating System if you're running a 32-bit version of Vista, and 64-bit Operating System if you're running the 64-bit version. Below is an example of what this would look like.

64-bit version of Windows system information

Windows XP users

  1. Press and Hold the Windows Key and the Pause key or open the System icon in Control panel.
  2. In the General tab of the System Properties window if your computer says Windows XP you're running the 32-bit version of Windows. If the computer is saying Windows XP Professional x64 Edition you're running the 64-bit version of Windows XP.

Additional information