Some computers in SoM getting error after trying agent installation (The target account name is incorrect. ).

I read KB and there is only one description.

Cause

When a computer is imaged and copied in a different computer, you will find two computers with the same account name.

But i don't have in my domain computers with same names.. And i won't rename it while PC is on remote work. From server where Desktop Central installed i can reach this PCs - name resolution is OK and pc is accesible.
Is there any other reasons which causing this problem?

Also sometime this error is converting to this "Unable to get the agent status. Operation timed out."