avgwdsvc.exe (full name AVG Watch Dog Service) is service belonging to AVG Security suite from AVG Technologies. It was first seen in version 8 and is critical to the functionality of AVG.
This process is non-essential and should not be terminated unless suspected to be causing problems.
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Non-system processes like avgwdsvc.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