Windows 10 can run on both 32-bit and 64-bit processor architectures. If you have a computer with a 32-bit setup, you can upgrade to the 64-bit version without acquiring a new license. The only caveat ...

If you are running a 64-bit version of Windows, expect OneDrive to be automatically upgraded. Windows has been available for home users as a 64-bit installation since Windows XP in 2005, but 64-bit ...