Yes, the reason that the defragmentation pauses is because your system is reaching those pre-defined thresholds, since the program is designed to use as few resources as possible during its work. I would try to change those numbers if your system can handle it. User mode and Kernel mode are two different kinds of CPU load procedures, it has nothing to do if you're using it or not. Also, all your drives have the OptiWrite switch to on, so they should be good to go. I'm using the regular PerfectDisc 13, nothing special or no special version.