![]() The easiest and least risky solution is to : Temporarily removing the battery from the motherboard (desktop PC) If you had changed a setting necessary for the proper functioning of your system.In this case, follow this : Create and configure a RAID 0, 1, 5. If you had enabled the RAID technology of your motherboard.If you are using virtualization technologies such as VirtualBox or VMware, you will need to enable the processor virtualization : Enable virtualization (Intel VT-x / AMD-V).Otherwise, a STOP blue screen will be displayed each time Windows starts. If you changed the hard disk controller before resetting the BIOS, you will need to restore the correct value by following these steps : Change the mode of the hard disk controller.No, because this will not make your computer permanently unusable.Īnd not if you have never changed an advanced setting in your BIOS. Use a third-party program (risky, so to use as a last resort).Use the Load Defaults feature of the BIOS.Temporarily removing the battery from the motherboard (desktop PC).Turn off the computer (use only as a last resort and with caution).When you enter the BIOS of your motherboard, you can modify many things (see the " BIOS" category of our site for interesting options).īut if you no longer know what you have changed or if you lose the BIOS password you have set up a long time ago, the simplest solution is to reset the BIOS of your computer.įor that, there are several possibilities, but the last solution must be used only as a last resort.Any changes made are reverted, and the BIOS or CMOS is set back to default settings. Access the Exit or Save & Exit tab in setup, select the Load Optimized Defaults option, select Yes, and press Enter.Press the F9 key to load default settings and press F10 to save and exit.If you have trouble exiting the BIOS or CMOS setup, you can try the following methods to fix the problem. ![]() Access the Exit or Save & Exit tab in setup and select the Exit or Save and Exit option.Press the F10 or F12 key to save changes and exit.Press the Esc key to exit without saving any changes.The most common methods include the following. There are several ways to exit the BIOS or CMOS setup depending on the computer's type. If this does not work, make sure your keyboard is working. Keep pressing the key until the computer stops booting, and you can enter setup. To do this, press and hold any key on the keyboard, and do not let go (you may get several beeps as you are doing this). Additional suggestions for accessing BIOS or CMOSįinally, if none of the above suggestions allow access to the setup, try generating a stuck key error, which gives an option to enter the BIOS or CMOS setup. Some early IBM computers require you to press and hold both mouse buttons as the computer boots to enter the BIOS setup. See the computer manufacturers list for contact information. Because these diskettes are unique to your computer manufacturer, you must obtain the diskettes from them. These diskettes may be called ICU, BBU, or SCU disks. ![]() BIOS or CMOS diskettesĮarly 486, 386, and 286 computers required a floppy disk to enter the BIOS setup. Older AMI BIOS could be restored to bootable settings by pressing and holding Insert as the computer is booting. While holding F10, two beeps should be heard to indicate the settings are restored. If your Acer computer cannot boot or you want to restore the BIOS to its original settings, press and hold the F10 as you turn on the computer. Below is a listing of key sequences to press as the computer boots to enter the BIOS setup. Unlike today's computers, older computers (before 1995) had numerous methods of entering the BIOS setup. If F10 doesn't work, look at the bottom or top of the screen for the key that's used to save the settings. ![]() If any changes are made, you need to save those changes, which is usually done by pressing the F10 key on the keyboard. For help with replacing the battery, see: How to replace the CMOS battery. If changes you made appear to revert to default settings, or the date and time setting in the BIOS keeps falling behind, you may need to replace the CMOS battery.
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