"This kernel requires a x86-64 CPU, but only detects a i686 CPU, unable to boot" problem resolution

1. Description of the problem:

There are no options for 64-bit OS on virtual box if there is an error (such as a problem) when installing Ubuntu system on Virtual box

2. Cause Analysis:

(1) The virtualization technology of the BIOS may not enable

(2) Virtual machine conflicts with Windows-only Hyper-V, resulting in a 64-bit operating system that cannot be installed on the virtual machine

3. Workaround:

(1) Restart the computer, enter the BIOS to enable VT;

(2) Go to the Control Panel "enable or disable Windows features", remove the Hyper-V option, restart the computer;

"This kernel requires a x86-64 CPU, but only detects a i686 CPU, unable to boot" problem resolution