I have installed Sitecore Habitat V1.8.1 while run Default in Task run Explorer faced below issue.
Error : 'Powershell' is not recognized as an internal or external command, Operable program or batch file.
If(err !=null) thorw err; in the file unicorn.js:44 file
Updated : Installed Powershell Version is 5.1 on my machine.
%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\
value inPath
environment variable.