http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2007112113262148 dcomcnfg.exe
Click OK.
Perform one of the following:
In Windows 2003/XP, expand Component Services, and then expand Computers. Right-click My Computer, and click Properties. On the Default Properties tab, on the Default Impersonation Level menu, click Identify.
In Windows 2000, on the Default Properties tab, on the Default Impersonation Level menu, click Identify.
Uninstall SEP
Change DCOM permissions
Re-install SEP
Incorrect DCOM Permissions prior to installation
To change the Default Impersonation Level using Dcomcnfg.exe
On the Windows taskbar, click Start > Run.
Type the following:
Hi, The first easy step to do when you get this errro is to try to restart the Symantec Event Manager service, and answer Yes to the question about also restart Symantec Endpoint Protection service.