I was having trouble updating the remote agent of a particular system after installing SP1 for Backup Exec 2010. I updated several other servers successfully, but this particular one would give me this error message:
"Error connecting to the remote server. Ensure that the server is available, has WMI enabled, and is not blocked by a firewall.24"
The firewall service was disabled so I knew that wasn't the problem. This computer is not a domain computer like all of our other systems, so I thought that had something to do with it. However after doing some research it seemed like that wasn't the issue.
I followed the work arounds in this post: https://www-secure.symantec.com/connect/forums/2010-remote-agent-installation-error
However all of the services that needed to be running were, and the GPO's mentioned had the proper user...