Question : The session setup from computer 'PcName' failed because the security database does not contain a trust account 'PcName$' referenced by the specified computer.

I am getting this error about every 5 minutes. I do not see this computer anywhere in AC, but I get a reply when I ping it and the name of the computer is in our naming convention. Can someone tell me what I need to do or how I can find where this computer is please?

Answer : The session setup from computer 'PcName' failed because the security database does not contain a trust account 'PcName$' referenced by the specified computer.

Excellent. Now that you've found it you need to join it to a workgroup and then join it back to the domain. Now you may want to wait for inco666 to reply so he can tell you why using the same name isn't a good idea but in my experience I've never had an issue nor her anyone that has.