How to Enter BIOS on an IBM Computer

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All IBM personal computers utilize a chip called the Basic Input/Output System (BIOS) to control the basic hardware functions of the computer. If you need to make a change in those basic functions, such as configuring the computer to boot from the CD-ROM drive instead of the hard drive, the change is made in the BIOS. Enter the BIOS configuration of your IBM or Lenovo computer by pressing the appropriate key as the computer starts.

  • Turn the computer off, then turn it back on.

  • Tap the "F1" key immediately after turning the computer on if you have a newer IBM desktop computer or certain ThinkPad models. If you have a Lenovo-manufactured ThinkPad laptop, proceed to Step 3.

  • Tap the key with the IBM logo immediately after turning the computer on if you have a Lenovo-manufactured ThinkPad laptop. If the F1 key does not cause your computer to enter the BIOS setup and there is no key with an IBM logo, proceed to Step 4.

  • Tap the F2 key immediately after turning the computer on.

Tips & Warnings

  • Certain older IBM and Lenovo computer models may require unique key combinations to enter the BIOS, such as "Ctrl," "Alt" plus another key such as "Ins" or "F3" simultaneously to enter the BIOS configuration. The initial screen displayed when the computer is turned on can be used as a reference. Nearly every computer displays the key(s) that should be pressed to enter the BIOS when it is turned on.

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