When I opened task manager this morning, I saw my cpu usage about 40% without running any program. I couldn't find any program using cpu much and system idle process shows over 90%. When I go to performance tab in task manager it shows kernal using over 30% of cpu. My system is newly installed xp on sata ahci hard drive. I've installed all the drivers. I cannot find any virus. Can anyone explain it and hep me? Also it wouldn't boot if I chose to increase the size of C with paragon software after reboot.