wkscal.exe is an application relating to Microsoft Work Suite. This is the Works Calendar which allows you to schedule meetings and other dates and times of significance. "This program is a non-essential system process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like wkscal.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