mxcrdcal.dll is a MxCrdcal
belonging to vCard//vCalendar support DLL for Win32
from Versit Consortium (Apple Computer, AT&T, IBM and Siemens)
Non-system processes like mxcrdcal.dll 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.