There’s always that time when you set up a new environment and want to get to that file registered in %PATH%, like msbuild in the developers console or something. You Google or dir /s and eventually find that files but always wonder, is there not an easier way?

Of course there is:

C:\where cmd
C:\Windows\System32\cmd.exe

Splendid, isn’t it, no more hunting for those nicely registered files.