autochk.exe is a part of the Microsoft Windows operating system. It allows functionality to revert core system settings back to their original state, and to backup where necessary. "This program is a non-essential system process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like autochk.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