Bios password wanasema ukitoa cmos battery kwa mida wa dk 3 ukarudisha itafanya kazi ila utapoteza configrations zote namaanisha hata system clock itajereset. Au u jam jumper switches either way u are killing the laptop.. Kama umenunua kwa mtu akipe tu password kama hana jisalimishe polisi maana kuna mtu juzi kawekwa ndani kisa kununua laptop ya wizi