To start a session with a particular execution policy, use the ExecutionPolicy parameter, and type: PowerShell.exe -ExecutionPolicy Restricted A PS prefix is added to the command prompt to indicate that you are in a Windows PowerShell session. To start a Windows PowerShell session in a Command Prompt window, type PowerShell. Otherwise, the session is the same as any session that is started in the Windows PowerShell console. For example, you can start a session that uses a particular execution policy or one that excludes a Windows PowerShell profile. When you use PowerShell.exe, you can use its optional parameters to customize the session. The PowerShell.exe command-line tool starts a Windows PowerShell session in a Command Prompt window.

NET Framework, Windows PowerShell helps IT professionals and power users control and automate the administration of the Windows operating system and applications that run on Windows. Windows PowerShell is a task-based command-line shell and scripting language designed especially for system administration.

Windows power shell