csrss.exe
CSRSS stands for Client/Server Runtime Subsystem. It generates a worker thread for client requests.This process is required by the Windows operating system and it should not be closed. It cannot be terminated from Task Manager.There are reports of viruses, spyware and keyloggers using the name of csrss.exe to fool the user. You can detect if the file is not the original csrss.exe by comparing its size.
