How to wipe a hard drive then load different hardware

ok i have a asus netbook and i took out the hard drive and replaced it with a dell hard drive now it thinks it a dell and a asus is there any way to wipe it then load only asus hardware????
 
Buy a USB hard drive external enclosure matching either SATA or PATA drives and format the Dell drive on another computer. Then install the freshly formatted drive in the Netbook. How are you going to re-load the operating system?
 
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