Nktos is a problem some faces due to malware. Clean serivices and startup app and remove malware from addor remove.
Runtime Broker is one system process which often consumes a large portion of CPU cycles, due to its poor memory optimisation. it can be disabled as follows: Go to Start menu > Settings app and then open System > Notifications & Actions. Deselect the option "Show me tips about Windows" and reboot the computer.