How to fix Kali Linux 2016.1 sources list

#step 1: open your   'sources.list'   from: Places>Computer>etc>apt>sources.list
              then remove everything and paste these lines:

deb http://repo.kali.org/kali kali-rolling main contrib non-free
deb-src http://repo.kali.org/kali kali-rolling main contrib non-free


#step 2: get everything clean and get update, upgrade and distribution upgrade with these command:

apt-get clean && apt-get update && apt-get upgrade && apt-get dist-upgrade