If you come across a similar issue to myself with Windows 2008 within Component Services that all of the security options in the majority of the DCOM Config entries are greyed out and you cannot change them you may need to do the following on the particular CLSID entry in regedit
1. Open regedit to 'HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\
{61738644-F196-11D0-9953-00C04FD919C1}' <- this is the CLSID of the app you wish to
amend
2. Right click the {61738644-F196-11D0-9953-00C04FD919C1} key and select
permission.
3. Next click Advanced and change the ownership from Trusted Installed to the
administrator account that you're using.
4. Re-open the component services/dcom config screen and you should now be
able to amend security on the CLSID.
The particular error I had was the following:
The application-specific permission settings do not grant Local Activation
permission for the COM Server application with CLSID
{61738644-F196-11D0-9953-00C04FD919C1}
and APPID
{61738644-F196-11D0-9953-00C04FD919C1}
to the user DOMAIN\sharepointwa SID (S-1-5-21-3696552686-295401563-3087639421-4121)
from address LocalHost (Using LRPC) running in the application container Unavailable
SID (Unavailable). This security permission can be modified using the
Component Services administrative tool.
This actually turned out to be the IIS WAM Admin Component