After changing 'MS SQL server' service's user name SDAC doesn't work properly

Question

I've changed 'MS SQL Server' service user name
from .\admin (have had such already) to network_services
and now my oracle linked servers to Oracle instance stopped to work.
Namely, 'Cannot create an instance of OLE DB provider "OraOLEDB.Oracle" for linked server Ora_RO'.
In event log i see next:
The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID 
{2206CDB0-19C1-11D1-89E0-00C04FD7A829}
 and APPID 
{2206CDB0-19C1-11D1-89E0-00C04FD7A829}
 to the user NT AUTHORITY\NETWORK SERVICE SID (S-1-5-20) from address LocalHost (Using LRPC). This security permission can be modified using the Component Services administrative tool.
So, MSDAINITIALIZE Class fails to start. I cannot locate this service under dcomcnfg. Could you help me?

Answer 1

The error seems to be clear what is causing the issue, check this link to fix this issue
Here the scenario is with SharePoint instead oracle so you can make out:-
http://www.wictorwilen.se/Post/Fix-the-SharePoint-DCOM-10016-error-on-Windows-Server-2008-R2.aspx
http://social.technet.microsoft.com/Forums/en-US/696204d5-b07e-46db-a785-737ea57b8da2/distributed-com-error-message
Mark ANSWER if this reply resolves your query, If helpful then VOTE HELPFUL
INSQLSERVER.COM
Mohammad Nizamuddin