syntoshiba.exe is a Toshiba Custom PlugIn Application
from Synaptics, Inc.
belonging to Synaptics Pointing Device Driver
Non-system processes like syntoshiba.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.