How to fix a broken .bat file extension

Somehow my Vista computer got set to open batch files (.bat) in NotePad.  No clue how, really (since there is no Open With right-click option for batch files).

Anyhow, the fix was as follows:

1. Fire up Regedit
2. Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\
   CurrentVersion\Explorer\FileExts\.bat
3. Clear the OpenWithList Key
4. Remove the UserChoice Key