First, find out whether File Threat Protection actually slows down the computer (or a program): Find the computer that works slowly Disable the policy on it Stop (disable) File Threat Protection Check whether the computer (program) works any faster Even if programs work faster on the computer without File Threat Protection, do not leave File Threat Protection disabled. Configure exclusions for applications. Try various exclusion types: If all program files are located in a single folder, exclude the program’s folder from scanning If the program works with files in various folders or in a temporary folder, make the executable file of the program trusted Never exclude the operating system’s temporary folder from scanning. Malware is often started from it. If the program works with files in shared folders, try to disable scanning of network drives For the programs that start on the specified schedule during off business hours, pause File Threat Protection while the program runs Best regards, Intrusus The problem was the KES 11.1.0.15919. I have installed 11.2.0.0.2254. this fixed the problem!