iam.exe is a process associated with Internet Answering Machine from CallWave.
It monitors your incoming phone calls while you are connected to the internet using the same phone line.
Non-system processes like iam.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues