Cannot offer remote assistance to Vista



Hi ,

I am in a windows 2003 Domain and have the following problem when using
remote assistance:

I can offer remote assistance to all Xp workstations but not to any Windows
Vista workstation. When I offer remote assistance to a windows Vista machine
I receive an error stating that " your offer to help could not be sent".

Furthermore the following event is registered in the novice machine:

Log Name: System
Source: Microsoft-Windows-DistributedCOM
Date: 5/14/2008 8:52:16 AM
Event ID: 10016
Task Category: None
Level: Error
Keywords: Classic
User: WINCUR\inocente
The application-specific permission settings do not grant Remote Activation
permission for the COM Server application with CLSID
to the user WINCUR\inocente SID
(S-1-5-21-2067679335-91960342-1233803906-2438) from address
This security permission can be modified using the Component Services
administrative tool.
Event Xml:
<Event xmlns="">
<Provider Name="Microsoft-Windows-DistributedCOM"
Guid="{1B562E86-B7AA-4131-BADC-B6F3A001407E}" EventSourceName="DCOM" />
<EventID Qualifiers="49152">10016</EventID>
<TimeCreated SystemTime="2008-05-14T12:52:16.000Z" />
<Correlation />
<Execution ProcessID="0" ThreadID="0" />
<Security UserID="S-1-5-21-2067679335-91960342-1233803906-2438" />
<Data Name="param1">application-specific</Data>
<Data Name="param2">Remote</Data>
<Data Name="param3">Activation</Data>
<Data Name="param4">{3C3A70A7-A468-49B9-8ADA-28E11FCCAD5D}</Data>
<Data Name="param5">WINCUR</Data>
<Data Name="param6">inocente</Data>
<Data Name="param7">S-1-5-21-2067679335-91960342-1233803906-2438</Data>
<Data Name="param8"></Data>

My Windows Vista workstations are running Windows Vista Enterprise Edition
with SP1.

Any idea what is causing this behavour?



The RA should be disable by default, u can enable by group policy.

The default properties of the RA exception.
1. Msra.exe application exception
2. RAServer.exe(the RA COM server) application exception.
3. DCOM Port 135
4. uPnp enable for communications with uPnP NATs

Brgds/Brandon Chau

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