Locked Hard Disk

If you can remember the P/W there will be a way to change it in the BIOS settings. Without the make and model it is hard to say where this setting is though (Usually in a security menu).

If you can not work out where it is just give the laptops manufacturers support line a call and they should be able to talk you through it.

If you can not remember the P/W then you need to give the manufacturer a call to reset the BIOS P/W (They will usually want POP before they will do this). Sometimes they will take it to a repair centre, sometimes they can assign a code to reset the BIOS P/W.