"How do I unlock the hard drive security lock out on my acer aspire one ZG5. Got it for Christmas and Its Mfg. date : 08/2009 so I guess it was a refurb. Was working fine then I let a relative surf on-line and He picked up 3 virus that McAfee allowed in. Now, I Power on and a blue box appears stating (Harddisk Security, underneath that, Primary Master Hitachi HTS543212L9ALock). So I hit Enter Then a new blue box appears that reads (Please input password for Hitachi HTS543212L9A)." DO NOT KNOW PASSWORD." Have tried - Alt + F10, F2, Ctrl Alt Del, etc. and all I get is the warning, invalid password. Then finally a boot drive, bootable disc prompt, over and over until it reads Harddisk Security again - etc. What is this password or any suggestion?