BIOS can be set to read large drives. All you have to do is enter BIOS at startup and change the settings so that it will read larger drives. But that may not be the problem. The problem could be that your BIOS was not made to handle that big of harddrive. This is true of older computers. BIOS can be upgraded to handle bigger drives. You will need to do a search for your BIOS on the internet and see what is available. Some upgrades are free but most will cost you money. Please be aware that upgrading the BIOS may not work and since the BIOS is such a vital part of your computer ruining your BIOS could ruin your computer. Your best bet may be to get a new computer and put the harddrive on it.