When i boot my computer the hdd is being utilized 100% for 3-4 miunutes and i tried uninstalled avast and checked hdd usage but that did not work uninstalled malwarebytes and still same. what processes are causing the high cpu usage. i5 haswell 3.0 ghz 8 gb ram nvida gt ge force 630. By the way i scanned my computer with avast, malwarebyes, superantispwate and hitman pro and nothing was found.