i am using DELL INSPIRON 1520, with windows XP running on it. And when in check DIVICE MANGER in COMPUTER MANAGMENT it show 4 missing drivers under other devices.. as base system device, base system device, base system device and SM BUS CONTROL|LER.  I have installed all drivers and utilities available on dell support site. i wonder is it driver for card reader or what..? and how can i get these drivers.