Windows 10, edition 2004. If I open cmd.exe or Powershell.exe as Admin, the 'L' key on my keyboard maps to 'Tab' for all windows other than the terminal (i.e. if I go to a browser to search for what's ...

Windows PowerShell 3.0 is just around the corner. If you've downloaded one of the Windows 8 previews, you've been able to kick version 3 around. Or you can download a beta candidate from Microsoft.