Debian OS Download

Hello, I am trying to download Debian OS to my computer and add it to VirtualBox. I have a 64 bit machine with Windows 10, but whenever I try to download the 64 bit version, my system does not allow me to select 64 bit, it only gives me the option to select 32 bit. Is there a setting that I need to change? I checked on a couple of my computers and the same issue. Any help appreciated.

Hi @vishnusingh, are you downloading the Debian image from its official website? I tried to download it, and it gave it all the options.