I have a Dell Inspiron 6400 laptop. I was a Windows user but I want to start using Ubuntu from now on. Everything goes well except installation of the teamviewer. I have downloaded the file from the official website. There, it says that just double click on the *.deb file and it will install it automatically. Well, it gives an error:

Failed to remove essential system package, You requested to remove a package which is an essential part of your system.

Then I tried the second way of installation, which is on the terminal. I types as suggested: sudo dpkg -i teamviewer_linux.deb. It started installing but later on failed. HEre is the copy of the screen.

Preparing to replace teamviewer7:i386 7.0.9377 (using teamviewer_linux.deb) ...
Unpacking replacement teamviewer7:i386 ...
dpkg: dependency problems prevent configuration of teamviewer7:i386:
 teamviewer7:i386 depends on bash (>= 3.0).
 teamviewer7:i386 depends on libc6 (>= 2.7).
 teamviewer7:i386 depends on libasound2.
 teamviewer7:i386 depends on zlib1g.
 teamviewer7:i386 depends on libxext6.
dpkg: error processing teamviewer7:i386 (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 teamviewer7:i386

I have already checked these dependent files in Synaptic and they are all installed.

What am I doing wrong?