dmascheduler.exe is a process which belongs to the DigitalMedia Plus Archiver. This program is non-essential process to the running of the program, but should not be terminated unless suspected to be causing problems.
Non-system processes like dmascheduler.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.