Powershell’ is not recognized as an internal or external command, operable program or batch file

Sounds like you’re missing an environment variable.

Add this to your Path environment variable:

%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\

OR

Change your script to this:

%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\powershell.exe -Command "your command"