Hello everyone!
I have a USB installed Kali Linux, and I just installed it yesterday instead of Windows. I was facing an "Unable to locate package" error, searched on Internet and edited my sources.list file like this:
HTML Code:
deb http://http.kali.org/kali kali-rolling main contrib non-free
deb-src http://http.kali.org/kali kali-rolling main contrib non-free 
## Security updates
deb http://security.kali.org/kali-security kali/updates main contrib non-free
deb-src http://security.kali.org/kali-security kali/updates main contrib non-free
But when I try using "sudo apt-get update", a new error occurs wich has shown below:

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Ign:2 http://security.kali.org/kali-security kali/updates InRelease
Err:3 http://security.kali.org/kali-security kali/updates Release
  404  Not Found [IP: 192.99.200.113 80]
Err:1 http://kali.download/kali kali-rolling InRelease
  Temporary failure resolving 'kali.download'
Reading package lists... Done   
E: The repository 'http://security.kali.org/kali-security kali/updates Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
I'm a beginner in Kali Linux, so I'm sorry If there is an easy solution for it, but I really need to fix this, with your help.

Thanks for your time.