How to determine if you have a 64-bit or 32-bit CPU

Determine if using 32-bit or 64-bit version of Windows

If you want to determine if the version of Windows on your computer is 32-bit or 64-bit, follow the steps below for your version of Windows.

Note:Keep in mind that a 64-bit processor can be using either a 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, 8, and 10
• Windows XP
• Windows 2000 and prior

Determine if Windows Vista, 7, 8 and 10 is 32-bit or 64-bit

1. Press and Hold the Windows Key and the Pause key
2. In the System window, next to System type it will list 32-bit Operating System for a 32-bit version of Windows, and 64-bit Operating System if you’re running the 64-bit version. Below is a picture and an example of this window.

Determine if Windows XP is 32-bit or 64-bit

1. Press and Hold the Windows Key and the Pause key or open the System icon in
   the Control Panel.
2. In the General tab of the System Properties window, if it has the text Windows XP, the computer is running the 32-bit version of Windows XP. If it has the text Windows XP Professional x64 Edition, the computer is running the 64-bit version of Windows XP.

Determine if Windows 2000 and prior is 32-bit or 64-bit

Windows operating systems, from Windows 95 to Windows 2000, are all 32-bit. There are no 64-bit versions of these operating systems.