What is vistafirewallservice.exe doing on my computer?
vistafirewallservice.exe is a Vista-Wall
belonging to Vista-Wall extended control for Vista Firewall
from Sphinx Software
Non-system processes like vistafirewallservice.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.