Question: virtualbox vt-x is not available windows 10 1903?
Answer: VT-x is Intel's technology for virtualization on the x86 platform. ... Make sure Virtualization is enabled in your BIOS. To check the status of Hyper-v in Windows 10,<right click start> | Run | OptionalFeatures.exe, and look for the "Hyper-V" option. The box should be empty, not checked or shaded.