Execute ps1 files at command line

1. Open regedit.exe

2. Export copy of the registry

3. Navigate to

HKEY_CLASSES_ROOTMicrosoft.PowerShellScript.1Shell

4.  Change the default from ‘Open’ to ‘0’

5. Could change default parameters to powershell.exe in HKEY_CLASSES_ROOTMicrosoft.PowerShellScript.1ShellCommand

Another option:
3. Navigate in registry to HKEY_CLASSES_ROOTMicrosoft.PowerShellScript.1ShellOpenCommand

4. Change Old Value:
“C:WindowsSystem32notepad.exe” “%1”

to New Value:
“C:WindowsSystem32WindowsPowerShellv1.0powershell.exe” -NoLogo -NoProfile -NonInteractive -ExecutionPolicy “Bypass” -File “%1”

Why not do this:

This makes it easy for dangerous .ps1 files to be executed.  With great power comes great responsibility.