Default unicode encoding for notepad document

This tip just applies for context menu (Right Click->New->Text Document)

1. Create a new .txt document and do not type anything
2.  Named the file above "txtunicode.txt." and save to C:\Windows\ShellNew\ (with unicode encoding)
3. Then go to run dialog type "regedit" to open Registry Editor
4. Navigate to HKEY_CLASSES_ROOT\.txt\ShellNew
5. Right click to right windows select New->String value and rename to FileName
6. Then type "txtunicode.txt" and click OK - it's finished

Now you can test be create new text document in context menu