开始使用win8的时候，由于工作需要必须使用Cisco VPN Client，但是在win8中Cisco VPN Client会报442错误，无法使用，下面是具体的报错信息：
Error Code 442 while connect to VPN server by Cisco VPN Client in Windows 8.Error message detail as below：
以下是该错误的解决方法：
Here is the solution to resolve the problem:
1.手动启动Cisco的虚拟网卡。
Manually enable the virtual network adapter named Cisco Systems VPN adapter.
2.启动Cisco的VPN服务。
Start Cisco VPN service.
3.修改注册表，进入注册表regedit,HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA找到DisplayName，
x86系统的将值"@oem16.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter” 更改为"Cisco Systems VPN Adapter”
x64系统的将值 "@oem16.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter for 64-bit Windows”更改为"Cisco Systems VPN Adapter for 64-bit Windows”
Modify the related key in Registry. Find HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA and modify 'DisplayName' as below:
For x86 OS: update "@oem16.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter” to "Cisco Systems VPN Adapter”
For x64 OS: update "@oem16.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter for 64-bit Windows” to "Cisco Systems VPN Adapter for 64-bit Windows”
4.尝试连接VPN，，即可成功连接。
Try to connect VPN.