treehouse python error in windows

Traceback (most recent call last):
 File "C:\python34\lib\encodings\cp437.py", line 14, in decode
   def decode(self,input,errors='strict'):
KeyboardInterrupt

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
 File "diary.py", line 67, in <module>
    menu_loop()
 File "diary.py", line 37, in menu_loop
   menu[choice]()
 File "diary.py", line 46, in add_entry
   if input('Save entry? [Yn] ').lower() != 'n':
KeyboardInterrupt: decoding with 'cp437' codec failed (KeyboardInterrupt: )