Navigate to the saved location and double-click on the vpnclient-win-msi-5.0.05.0290-k9 file to unzip it. You will be prompted to specify the folder to place the files into upon extraction.
If the installation does not start automatically, select Start > My Computer (Vista: Start > Computer) and navigate to the folder with the extracted installation files (12 files).
Double-click the vpnclient_setup.msi file to launch the Cisco VPN Client installer. Note: The file extension (.msi) may or may not be displayed depending on your Windows XP options.
Follow the installation instructions on your screen. Note: If you have an older version of the Cisco VPN Client installed, you will be prompted to uninstall the software before running the new installation.
Mac:
Double-click the CiscoVPNClient drive image mounted on your desktop.
Double-click the CiscoVPNClient.mpkg file to launch the installer.
Follow the installation instructions on your screen.
When the installation is complete you must restart your machine.