"HomeGroup Listener" service can't start

Greetings.
trying to get a homegroup working with your guide, , but after testing the services you write are nessecary I found one service that can't start - "HomeGroup Listener". When I try, I just get an error, and that I can see more in the event viewer. The eventviewer gives this description:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Service Control Manager" Guid="{555908d1-a6d7-4695-8e1e-26931d2012f4}" EventSourceName="Service Control Manager" />
<EventID Qualifiers="49152">7024</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8080000000000000</Keywords>
<TimeCreated SystemTime="2014-05-01T20:50:51.977702800Z" />
<EventRecordID>12937</EventRecordID>
<Correlation />
<Execution ProcessID="876" ThreadID="1020" />
<Channel>System</Channel>
<Computer>Sven-Pc</Computer>
<Security />
</System>
- <EventData>
<Data Name="param1">HomeGroup Listener</Data>
<Data Name="param2">%%-2147023143</Data>
</EventData>
</Event>

What to do about this?

Found the solution.
Allthough I have BitDefender Total Security installed, Windows Firewall service must be running, then homegroup works just fine :)