@Ukko wrote: Hello,   Sorry for my reply. I am only an F-Secure user (their home solutions). I think that one option is try to contact their official Support Channel (chat as example): https://www.f-secure.com/en/web/home_global/contact-support and then to use their ftp for uploading fsdiag (ftp.f-secure.com): https://community.f-secure.com/t5/Common-topics/How-do-I-submit-a-large-FSDIAG/ta-p/77917 For example, as own tries to troubleshoot: -> does "CPU"-usage is happened right after system load? Or after certain point then (or even after launch certain application)? -> and does such situation is not only some minutes (five/fifteen)?   Thanks! Hello. Thanks for the reply. I haven't had the same problem since my last report in the forum and everything working normally for now. I was suspected for my BitTorrent client (qBittorent) but I'm not downloading any pirated software or application and all files are verified and safe from Academic torrents so this was not the main reason. I'm going to report further happenings in here for a more precise procedure to find the real reason behind this behavior.  ... View more