In this guide you will find how to find your Windows Operating System Architecture.
1). By going to Control Panel – > System (or you can use the shortcut: Win key + Pause break key)
2). Through CMD with this simple command:
wmic os get OSArchitecture
c:\>wmic os get OSArchitecture
3). If you have two Program files folders, one named Program Files(x86) for x86 applications and another one named Program files, than you have a X64 Windows on your computer.