viritfw.exe is a VirIT Personal Firewall
belonging to TG Soft - VirIT Personal Firewall
from TG Soft S.a.s.
Non-system processes like viritfw.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.