On my Exchange server, my Event log has recently filled up because every few minutes I get the following error:
DCOM got error "Logon failure: the user has not been granted the requested logon type at this computer. " and was unable to logon DBR_HOUSTON\Administrator in order to run the server:
The only thing I have done on this computer lately is install and configure Groupshield, but the McAfee people say it's unrelated to Groupshield. I have searched the Microsoft Knowledge Base, and have found some similar errors, but nothing exactly like this. Most of the ones I have found deal with IIS (which isn't even installed on this machine) or other software that is not installed on this machine.