Several tips in this guide involve making changes within your computer's BIOS (Basic Input/Output System). The BIOS is the set of instructions your motherboard has built into it which allow it to work with the rest of the hardware in your system.

Some BIOS settings can be changed, and the changes stored in a small area of memory built into the board (the CMOS) which is powered by a single coin-cell battery. The actual BIOS itself cannot be changed (though it can be completely written over by a newer BIOS version, see Tip 11).

To edit the BIOS settings, most systems require you to press the DEL key while the computer is going through its initial POST (Power On Self Test) the first screen that appears after turning your system on. Once you are in the BIOS screen, changes can be made to the available settings by highlighting the item, pressing ENTER then choosing from a list - usually with the +/- keys.

Note that these changes will not take effect until you have saved them (using the menu option) and restarted the computer. It is possible that your motherboard's BIOS may not contain some of the settings that we will edit below, as boards from various manufacturers differ widely.

Again to edit the BIOS settings:

Press DEL several times immediately after restarting your computer. Other manufacturers like IBM may require a different key (such as F2, or F6), but thisshould be listed on the POST screen.

Select the menu and item you wish to edit, press ENTER and choose the correct setting. Save and exit the BIOS, which will restart your system and put your changes into effect.

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