Consider this scenario:
- You have hyper-v installed on a windows server/client OS and it’s working fine
- You install oracle virtual box or any 3rd party virtualization application on machine and it fails with below error:
VT-x/AMD-V hardware acceleration is not available on your system. Certain guests (e.g. OS/2 and QNX) require this feature and will fail to boot without it.
Turns out this behavior is by design. Many virtualization applications depend on hardware virtualization extensions that are available on most modern processors. This includes Intel VT-x and AMD-V. Only one software component can use this hardware at a time. The hardware cannot be shared between virtualization applications. Resolution steps for it are covered in the article link. Basically, it is to disable/remove hyper-v role.