How to resolve VT-X is not available error in Oracle VM VirtualBox when tried to start a VM

1. In the Administrator elevated command prompt, paste the following command to disable Microsoft Hyper V and press Enter:

   dism.exe /Online /Disable-Feature:Microsoft-Hyper-V

2. Once the command runs successfully, close the elevated Command Prompt and restart your computer.
3. At the next startup, open a Virtualbox machine again and see if you’re still getting the same error message.

Go lang debugger delve installation error on Mac OS: xcrun: error: invalid active developer path, missing xcrun

Today I installed Go lang on my macbook Pro and installed VS Code and the Go lang extension for it.
When I tried to Run the first hello.go program from the VSCode Run menu got a prompt that Delve which is the debugger extension for Go lang to be installed.
When I tried to install Delve got this strange error:


Mac OS: xcrun: error: invalid active developer path, missing xcrun

On looking up the internet found that running the below command on the terminal will solve the issue:

Install the Xcode toolkit! Even if you had it installed before, you might have to re-register it or update it to the latest version.

$ xcode-select --install

If that doesn’t work, force it to reset. You’ll need sudo access for this one.

$ sudo xcode-select --reset

And voila, Delve got installed successfully using the 
go get -V github.com/go-delve/delve/cmd/dlv command and all was well. Now I am able to neatly run the Go lang programs from the Run menu of VS Code editor.

Alternatively using the below commands was always working without installing Delve as well which is the default option for you to build & run the Go programs.
go build hello.go 
./hello

Enjoy coding Go!!