Install teamviewer7 on ubuntu 12.04 :
Download a fresh teamviewer Debian package from “http://www.teamviewer.com/hi/download/index.aspx”
and issue below command with downloaded teamviewer package .
krizna@leela:~$sudo dpkg -i teamviwer_linux.deb
Type Teamviewer on your search and you can see the “Teamviewer 7” icon . click the icon to launch the Teamviewer .