How to reset a lost administrator password in Windows Server 2016 2012 and 2008

Update video: https://youtu.be/UzzGynSH5jU
Microsoft made some changes that require an update to the procedure.

Professor Robert McMillen shows you how to reset a lost administrator password in Windows Server 2016 2012 and 2008. This is all done without any third party software or cost. It only takes a few minutes and anyone can do it.