Hi,
Here is the link:
http://www.cisco.com/kobayashi/sw-center/sw-vpn.shtml
Please chose "Cisco VPN client" - includes Cisco VPN Client 3.X and greater (Unified Client Framework)
3.x client working on win95 to XP. It need concentrator running 3.x code as well.
Please make sure you have 3DES access in your CCO login profile.
If you have not ,you need fill out the export control form, when you first time going to the above link. Then it will be fine.
Best Regards,