encoderserver.exe is a program which is most likely legit. So, if encoderserver.exe is on your laptop or desktop computer, it is most likely ok, and will NOT cause problems. Even if your PC is clean, it is still recommended to use a good antivirus with a good detection rate, in order to defend your PC against viruses and malware.
Usually, the default name and directory where the program is stored is
C:\Program Files (x86)\RivaTuner Statistics Server\EncoderServer.exe.
The MD5 checksum for this program is a4f98de504e2e15f7f7a80d732e3b449.
This program is NOT registered as a Windows service. This is good.
This executable runs in 32-bit mode. It does not use the entire set of features of modern computer processors. This is quite normal because the makers did not upgrade it to 64-bit code.
The description extracted from the program is EncoderServer.
File version stored as a property 126.96.36.199.
Copyright notice Copyright © 2013-2016 by Alexey Nicolaychuk aka Unwinder.
This file does NOT have visible windows. This is most likely a bad thing.
A digital signature is missing from this program. The authors did not bother to sign it. This is probably bad.
It has an uninstall routine, which is good. si are uninstall.