Okay, then try this:
Navigate to
CODE
HKEY_CLASSES_ROOT\.txt
.
Then, read what it says under (default). Normally, it should say txtfile. So, if you navigate to
CODE
HKEY_CLASSES_ROOT\txtfile
, you will see Edit there. But if you see other than txtfile, then maybe you are using another program for viewing txt files. Navigate to whatever says instead of txtfile and see if it's there.
Otherwise, go to file types in folder options and see if you see Edit there and delete it there.