idrivert.exe is a process which belongs to the InstallShield product installation service which should only appear when you are installing a new piece of software. "This program is a non-essential process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like idrivert.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues