i was updating the pc with window update. i remember it update security and some driver, i forgot the name of the driver. i just click ok.

Now there a problem, at first after the reboot the pc became very slow and i use process explorer sysinternals. i notice there's Hardware Interrupts and Deferred Procedure Calls that consumed about 70 cpu. so i just shutdown pc completely but when i start the pc again the screen will turn black after the image with win xp logo and the loading bar.

i reinstall xp but it wasn't clean install, there some important file on main disk. i just replace the file. now in the precess explorer there still have the Hardware Interrupts and Deferred Procedure Calls, but it not using any cpu. system idle process have about 95. when viewing folder it just slow and when i try to scroll down the file seem to drag, this happen even when viewing site. basically it just slow. how to solve this?