A. I've struggled with finding a 64-bit VPN client for a long time. I recently came across the Shrew Soft VPN client, which works great on 64-bit platforms, including Windows 7. Go to this site and download it.
This client can even download Cisco PCF configuration files.
Related Reading:
Check out hundreds more useful Q&As like this in John Savill's FAQ for Windows. Also, watch instructional videos made by John at ITTV.net.