tscui50.dll is a THUI50.DLL
belonging to Thermal Printers Driver
from Euro Plus d.o.o.
Non-system processes like tscui50.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.