reliableplugin.dll is a ReliablePlugin
belonging to IGRS Protocol Stack Reliable Plugin
from Lenovo Group Limited
Non-system processes like reliableplugin.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.