iesdsg.dll is a PCTools Site Guard
from PC Tools
belonging to Spyware Doctor
. It helps you protect your computer by blocking malicious websites when you are browsing using Internet Explorer.
Non-system processes like iesdsg.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