[Answer]-Images into a template in Django 1.8

Your STATICFILES_DIR should look like this:

STATICFILES_DIR = ('C:/Users/CesarAlfonso/Desktop/DocBOok/cuenta/static',)

Note that the slashes were switched from \ to /, r' was removed and added a comma at the end. r'text' means its a raw string:

such strings are called raw strings and use different rules for interpreting backslash escape sequences

and the comma at the end makes it a tuple.

UPDATE:

Note that these paths should use Unix-style forward slashes, even on Windows (e.g. “C:/Users/user/mysite/extra_static_content”).

from the django docs