Cisco VPN Client does not officially support Windows 8 and has many issues. We were able to ask the TOC about this issue. IPsec to L2tp or straight ipsec connections are supported, but cisco VPN client will not run on Windows 8. In Fact the client will not be supported by Cisco come 2014 as they feel their ssl protocol is much more secure. The work around to install Cisco VPN Client is to edit the registry:
Open Registry editor by typing regedit in Run prompt
Bowse to the Registry Key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA
Select the DisplayName to modify, and remove the leading characters from the value data up to "%;":
For x86, change the gobeldegook data from something like "@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter” to "Cisco Systems VPN Adapter”
For x64, change the value data from something like "@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter for 64-bit Windows” to "Cisco Systems VPN Adapter for 64-bit Windows”
Try connecting again
Instead you can use the native Windows 8 VPN Client. Be sure IPsec to L2tp is enabled on your ASA. Just open the Network and Sharing Center, click Set up a new connection or
network, click Connect to a workplace and complete the wizard.
If a third party client is better for you, Shrew is the preferred app and has far fewer issues. it even imports cisco VPN profile file (.pcf). (http://www.shrew.net/download/vpn/vpn-client-2.2.0-rc-2.exe).