Well your error message doesn't say anything about wrong user.
Check your IP/Name of the vCenter Server you are trying to connect to in the vSphere Client and make sure the vCenter Server service is running on the Windows Server.
Well your error message doesn't say anything about wrong user.
Check your IP/Name of the vCenter Server you are trying to connect to in the vSphere Client and make sure the vCenter Server service is running on the Windows Server.