1. Turn on your computer and press the key on your keyboard to enter the BIOS. This is typically the Del (delete) key. Pre-built systems from major manufacturers may use a function key such as F1, F2, or F10.
2. Go to the last tab or page of your BIOS.
3. Select an option similar to "restore factory settings".
4. Save your changes and confirm your selection if necessary. This will often be combined with the process of exiting a BIOS. Some BIOS types may have this as a separate option such as "F10: Save Changes".