msiexec16.exe is a process which is registered as Troj/OptixP-13 Trojan.
This process can allow an attacker to gain control of system, steal passwords and access personal data and network shares. This process is a security risk and should be removed from your system.
Please see additional details regarding this process.
Non-system processes like msiexec16.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