How do I choose between the Windows 64 Bit version and 32 Bit version?

On your Windows computer:

1. Open a File Explorer window by pressing Windows Key + E.
2. On the left, right-click This PC.
3. In the context menu, select Properties. The System Properties window opens.
4. In the System Properties window, find your System type, which lists your operating system and CPU type.

For more detailed instructions follow this link.