32-bit and 64-bit Windows: Frequently asked questions
Here are answers to some common questions about the 32-bit and 64-bit versions of Windows. How do I upgrade from the 32-bit to the 64-bit version of Windows? How can I tell if my computer is running a 32-bit or a 64-bit version of Windows? Windows 10 and Windows 8.1. Select the Start button, then select Settings > System > About .