Using VirtualBox on Windows 10 is a little bit different with other os. The first time when loading a virtual box image into VirtualBox, you may meet the
VT-X is not enabled error.
To solve this, there are two steps you need to do.
Step 1: Turn off Hyper-V Platform in Windows Feature
Step 2: Open a command prompt as Administrator and run the following command
dism.exe /Online /Disable-Feature:Microsoft-Hyper-V
Step 3: Restart your workstation
This may take several minutes to let Windows complete all undernerth setting.
Step 4: Relaunch VirtualBox and start the virtual image