There is a newer version of the AnyConnect client installed

解决办法，注册表删除

HKEY_LOCAL_MACHINE \SOFTWARE\Deterministic Networks

Search with the following keywords in the registry, under "Uninstall" or "Components" folders and delete any related entries.

Vpnapi

Vpngui

Cisco

CVPND

CVPNDRA

Ipsecdialer

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Disable Internet Connection Sharing (ICS) and then try You can disable ICS in two ways:

Per Adapter:

1. Click the Start button.
2. Click on Control Panel.
3. Click on View Network Status and Tasks
4. Click on Change adapter settings
5. Right-click the shared connection and choose Properties
6. Click the Sharing tab
7. Clear the Allow other network users to connect through this computer's Internet connection checkbox
8. Click OK

System Wide:

1. Click the Start button (Windows' orb)
2. Type: services.msc and press ENTER
3. Double-Click on Internet Connection Sharing (ICS)
4. Change Startup Type to Disabled
5. Reboot the computer

You can now try reinstalling the WiscVPN client again