Like most computers, the Dell Dimension 5150 uses its basic input/output system (BIOS) as the main set-up program, controlling such important aspects of PC operation as power-management settings and even which devices get turned on when your computer powers up. Never try to change the BIOS if you don't know exactly what you're doing, since any errors made during this critical task carry the risk of severely damaging the way your computer operates.
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- Dell Dimension 5150 computer
Check the Dell Dimension 5150's power. If the computer is off, press "Power" to turn it on. If it is already on, restart it.
Press the "F2" key to enter the BIOS on the 5150 computer. Keep in mind that the BIOS utility is based on MS-DOS, Microsoft's Disk Operating System, which ran early PCs in the days before Windows and mice. As a result you will not be able to use your computer's mouse to make changes. You can only use your keyboard.
Highlight the BIOS category you'd like to change and hit "Enter" to select it. You can use the "Boot" tab, for example, to change the primary boot device for the Dimension 5150. You can use the "Power" tab to change different power-related settings on your computer. You can use the "Load BIOS Defaults" option to change all of the current settings of your BIOS back to their original factory defaults.
Highlight the "Save Changes and Exit" option when you're done making changes to your BIOS. Hit "Enter" to select it. This will save all the changes you've made to the BIOS. Exit the BIOS, restarting your machine. Your operating system will now load.
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