Finally Cisco is doing something with this. As of February 18, 2010, Cisco published a VPN IPsec client beta support for Win-7 and Vista 64-bit.
Key Capabilities available for Beta Testing:
New Platform support – Windows 7 & Windows Vista 64-bit platform compatibility
Software Access: http://tools.cisco.com/support/downloads/go/Redirect.x?mdfid=281940730 (under 5.BETA)
Software is available for download by any customer with a Cisco.com SMARTnet™ enabled login.
Please have customers communicate feedback (both positive and problems) to firstname.lastname@example.org.
Original post below:
Almost everyday we are getting calls from our remote users that they bought a new 64bit computer and they cannot work remotely because the Cisco VPN client does not support 64bit OS. It seems like Cisco has no plans on creating a VPN Client for 64 bit OS's. You can try to have Cisco change their hearts by opening up a TAC case. Request for them to create a VPN IPsec client support for 64bit. Also refer to BUG ID# CSCsb35984.
Cisco Support number 1 800 553 2447
You can also use a third party VPN Client that supports 64bit OS and it works with cisco.