How to install and work with Cisco VPN Client?
The Cisco developers provide users with the possibility to read about install and uninstall procedures using their Support page. I recommend checking the available links posted on the page to find out how to install the client and how to work with it.
Cisco support: http://www.cisco.com/c/en/us/support/security/vpn-client/tsd-products-support-install-and-upgrade-technotes-list.html
Note: The links will point to the Mac release version. For Windows, the process is pretty straightforward. Download and install the package, then launch it and use the credentials you received from your company or Cisco to connect over a virtual private network.
Home page: http://www.cisco.com/c/en/us/support/security/vpn-client/tsd-products-support-eol-series-home.html