|To reset HardDrive password created in BIOS on a AOD250 netbook Acer Aspire one :|
Remove HDD and reboot press F2
> Security Clear all passwords reset to default values and save on exit
>Allow pc to reboot (Messages will appear the last message no HDD detected. Turn off by pressing off switch three seconds)
> Install HDD
>Boot PC Then Press F2 immediately
>Look for Security Tab in BIOS
>Notice the Word FROZE has disappeared
>Type Original Password
>Then hit enter, Then enter again and save
>U will notice it now says clear.
I had to attemp this three time and it finally worked.