ahnsdsv.exe is a Update Serivce
from AhnLab, Inc.
belonging to AhnLab Anti-Virus
. This is a Smart Update Service to keep the application up to date.
Non-system processes like ahnsdsv.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