edtsrv.exe definition, relationships, removal:

edtsrv.exe is an executable file that starts a malicious process, launches certain parasite components or runs a destructive payload. Even if the edtsrv.exe file does nothing suspicious, its presence indicates that your computer is infected with a particular threat.
The edtsrv.exe file is installed and used by trojan Pest. It is also related to other parasites such as trojan AntiLamer Trojan, Anal Rape 1.0a, AntiLamer Backdoor, AntiLamer Backdoor 2.0, DarkFace, DataRape, Hellz Addiction, Katux Latinus, LAN Hacker beta and LANfiltrator. These threats can use edtsrv.exe for different purposes, as the file's functionality depends on a particular parasite it belongs to.
You are highly advised to scan the system, delete executable edtsrv.exe and terminate all the processes it started.
In some cases a presence of edtsrv.exe does not mean that your system is infected. The file may actually belong to some fully legitimate applications and therefore must stay intact. If you are in doubt, please scan the edtsrv.exe file using you regular spyware remover or antivirus program.