well... my little brother accidentally drop my hard disk...then i plug in my laptop and it says installing software..then nothing happen ..blank ...and i forgot my hard disk name but its from acer and its model AH025..thanks for your help

about the clicking sound ..yeah it does sound like that ...well i guess i have to buy a new one ..thanksIf it says "installing software" endlessly, it probably means BIOS cannot identify the HDD, which is one of many ways a HDD can tell you it's dead. See if you can hear a clicking sound from it too.