I too am having the same issue on 8.1 the virtual adapters will not enable throwing an error that they cannot bind to a physical adapter this is the Event Log pertinent info.
Log Name: System
Date: 7/10/2013 1:23:42 AM
Event ID: 4
Task Category: None
Unable to bind to physical adapter. To resolve, remove the adapter team and then create a new team.
<Provider Name="iANSMiniport" />
<TimeCreated SystemTime="2013-07-10T08:23:42.294168800Z" />
The software for Windows 8.1 hasn't been released yet. And, as you have found, the software that worked for Windows 8 will not work with Windows 8.1. Ethernet drivers and software for Windows 8.1 will be available later this summer and we will be supporting the released version of Windows 8.1.