To upgrade Windows 10 to 64-bit, you'll have to perform a clean install, so back up all your data; ensure you have a 64-bit CPU. Download the Windows Media Creation Tool to create a 64-bit Win 10 ...

It will be the 64-bit version for most people, but you can confirm if you are 32-bit, 64-bit, or running ARM using these instructions.

It is important to note that you must download either the 32 or 64 bit version. You can find out what your computer is running by visiting the Control Panel and selecting System.

Windows 10 is finally getting a 64-bit version of Microsoft's OneDrive syncing app But it warns Surface Pro X users with an Arm processor to stick with the 32-bit version of OneDrive.