Dear Sirs,
I installed fresh Linux Kali. Below are details when perfomed cat /etc/*-release

DISTRIB_ID=Kali
DISTRIB_RELEASE=kali-rolling
DISTRIB_CODENAME=kali-rolling
DISTRIB_DESCRIPTION="Kali GNU/Linux Rolling"
PRETTY_NAME="Kali GNU/Linux Rolling"
NAME="Kali GNU/Linux"
ID=kali
VERSION="2016.1"
VERSION_ID="2016.1"
ID_LIKE=debian
ANSI_COLOR="1;31"
HOME_URL="http://www.kali.org/"
SUPPORT_URL="http://forums.kali.org/"
BUG_REPORT_URL="http://bugs.kali.org/"

My sources.list content is (The Kali Rolling Repository)

deb http://http.kali.org/kali kali-rolling main contrib non-free
# For source package access, uncomment the following line
deb-src http://http.kali.org/kali kali-rolling main contrib non-free

I have done the following
apt-get update
Then
apt-get upgrade

I waited around 35-50 minutes.

When finished everything, the system rebooted itself.
However
(1) I cannot see any menu item (All of them disappeared)
(2) I cannot open anything (for example Terrminal, Firefox, etc). When I try to open for example Terminal or Firefox, this causes the system to reboot it self.

Please help. I have now installed fresh Kali Linux again. I want to perfrom apt-get update then apt-get upgrade. But I also wich not to see the problem again.

Your help is very much appreciated.
I am stacked. I cannot go forward.