Base Filtering Engine and network disconnects

Question

Good day everyone,
I'm working in a standard enterprise environment with windows servers, active directory and windows 7 clients.
Some days ago I've encountered a particularly strange network adapter behavior on some users' machines.
A yellow exclamation mark shows up on the tray icon as if it lost connection, although doing ipconfig displays that it still has ip address, dns, gateway, etc, but no connection to outside world. It only pings itself and localhost. Running windows troubleshooter,
it resets the adapter and it works for a couple minutes, then reverts to this state.
I've managed to pinpoint it to a specific windows service - Base Filtering Engine. If I disable this service, everything is ok. Now, there're a few dependencies that go down with it - specifically windows firewall and ipsec, but disabling them alone doesn't
help. Also, clearing out windows firewall rules doesn't work.
I've tried to find anything in windows events logs, but I couldn't.
So, my question is how can I further investigate this issue, to find out what makes BFE do this to the network adapter?

Answer 1

As this thread has been quiet for a while, we assume that the issue has been resolved. At this time, we will mark it as ‘Answered’ as the previous
steps should be helpful for many similar scenarios.  
If the issue still persists and you want to return to this question, please reply this post directly so we will be notified to
follow it up. You can also choose to unmark the answer as you wish.  
In addition, we’d love to hear your feedback about the solution. By sharing your experience you can help other community members
facing similar problems.  
Thanks!
Arnav Sharma | http://arnavsharma.net/ Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading
the thread.