If VirtualBox is not showing 64-bit Operating System, Enable Hardware Virtualization or Disable Hyper-V. More suggestions are here in this post.

Inside the pop-up window, enter the Name of your VM, select its Folder (directory), and make sure the Type setting shows Microsoft Windows, with the Version option set to Windows 11 (64-bit).

VMware has a press release on their website that announces the release and availability of version 3.0 of Fusion, which brings 64-bit support along with other enhancements to the software.

In the case of Windows 11, this means at least 2GB of main memory for a 64-bit version, but 4GB is better. If you also want to install the operating system in the virtual environment, you will ...