How can I use Notepad to open files with unknown extensions?
The following steps will make Notepad the default program for opening files with unknown or unregistered extensions: 1. Using the registry editor, locate the HKEY_CLASSES_ROOT\Unknown\shell key. 3. On the Edit menu, select New | Key and then create an “open” key. 4. In the open key, create a new “command” key. 5. Click the Default value in the command key and type notepad.exe %1.
