What is registrycontroller.exe doing on my computer?
registrycontroller.exe is a Registry Controller
from Nuance Communications, Inc.
belonging to Scansoft PDF PConverter
Non-system processes like registrycontroller.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.