my win 7 ultimate unprovoked cpu useage to 100%

my laptop is HP hdx18t, it was installed vista running normal ,all OS use very smooth. then i buy use HP oem win 7 ultimate DVD install win 7. then i got intermittent lockup. and i checked cpu useage when lockup is 100% . also i checked task manager processes, all running software plus together is lower than 100% cpu usaage, but totally cpu useage is showing 100% and all OS running very slow same like lockup ,thi is let me so confuse. all driver download the last driver from HP website. i tested the HDD and RAM is normal and running vista all normal. any one know the my laptop's problem ? thanks a lot



This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.