avengine.exe is a process belonging to the Panda AntiVirus Internet security suite, and is essential for protecting your computer from Internet-bound threats. This program is important for the stable and secure running of your computer and should not be terminated.
Non-system processes like avengine.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues