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I think they worth it, but it is up to you. If you expect to buy a 3d printer and start to print, and get spectacular results, you will have to spend a lot of money. If you are a student or a enginner, you will no be asking this, then you should be a normal person.

The problem is not your bios, your laptop should have a jumper to lock the hardware, then if you change the hard drive the laptop doesn´t recognize it, you have to change the jumper, chech the manual or try to talk Acer support.