ubuntu配置NS3环境再开机后状态栏和图标全部不见了

我是在win7环境下用wubi装的ubuntu，开始时运行都很正常。在配置了NS3环境后显示还很正常，但是再开机后桌面上只剩下一个桌面壁纸了，状态栏图标什么的都不见了，求大神指教。
配置的指令如下：
sudo apt-get install gcc g++ python
sudo apt-get install mercurial
sudo apt-get install bzr
sudo apt-get install gdb valgrind
sudo apt-get install gsl-bin libgsl0-dev libgsl0ldbl
sudo apt-get install flex bison
sudo apt-get install g++-3.4 gcc-3.4
sudo apt-get install tcpdump
sudo apt-get install sqlite sqlite3 libsqlite3-dev
sudo apt-get install libxml2 libxml2-dev
sudo apt-get install libgtk2.0-0 libgtk2.0-dev
sudo apt-get install vtun lxc
sudo apt-get install uncrustify
sudo apt-get install doxygen graphviz imagemagick
sudo apt-get install texlive texlive-pdf texlive-latex-extra texlive-generic-extra texlive-generic-recommended
sudo apt-get install texinfo dia texlive texlive-pdf texlive-latex-extra texlive-extra-utils texlive-generic-recommended
sudo apt-get install python-pygraphviz python-kiwi python-pygoocanvas libgoocanvas-dev
sudo apt-get install libboost-signal-dev libboost-filesystem-dev