Save the software download (vpnclient-win-msi.exe) to your desktop or a local folder.
Navigate to the saved location and double-click on the vpnclient-win-msi.exe file to unzip the files. You will be prompted to specify the folder to extract the files to.
Select Start > My Computer (Vista: Start > Computer) and navigate to the folder to which you extracted the 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 display depending on how you have your Windows XP options set.
Follow the installation instructions on your screen. Note: If you have an older version of the Cisco VPN Client installed, you are prompted to uninstall the software before running the new installation.
Mac:
Double-click the CiscoVPNClient drive image that was 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.