retrorun.exe an executable of Dantz Development Retrospect Backup. It is a process which can be loaded during the startup an it manages the scheduling of backups. Disabling or enabling this is down to user preference, however doing so will disable automatic backups using this piece of software.
Non-system processes like retrorun.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