How do I start PowerShell from Windows Explorer?
In Windows Explorer, just go to the Address Bar at the top (keyboard shortcuts: Alt+D or Ctrl+L) and type powershell or powershell_ise and press Enter. A PowerShell command window opens with the current directory.
Just to add in the reverse as a trick, at a PowerShell prompt you can do:
ii .or
start .to open a Windows Explorer window in your current directory.
If you're on Windows 8, or later, you can simply use the built-in File → "Open Windows PowerShell".
Or Alt + F followed by R.