If you’re asking yourself how to boot Windows 10 into the “Last Known Good Configuration” mode, the short answer is that you’re out of luck.

It's an easy and direct way to boot your computer up in good condition, giving you the ability to troubleshoot further issues. This includes “ Last Known Good Configuration ,” a recovery option that's built into all versions and editions of Windows 7.

Legacy Support ( On/Off or Enabled/Disabled).Windows comes with multiple ways to start your computer. Some of the possible setting names you’re looking for will include, the bold values are what should be selected. Turning on Legacy Boot SupportOnce inside the UEFI setup and configuration section, you’ll be presented with a number of options and parameters that can be configured for the firmware environment. The option you’re looking for has many names, depending on the make and model of the PC or laptop and the EFI firmware. This key changes from PC to PC, it all depends on your PC’s make and model.Typically, you will see a brief note at the bottom or top of the screen indicating what the key is. One such screen is visible to the right, note the legend in the top-right corner indicating F2 will start the BIOS setup and F12 will present the boot selection menu.Some common options include the F2, F8, F12, and Del keys. However, it could be any of the one hundred other keys on your keyboard.

Notice the key guide in the top-right corner.Immediately after powering up your PC, as soon as the manufacturer logo (e.g.ĭell, Lenovo, HP, Toshiba, Samsung, ASUS, Acer, Gateway, etc.) shows up on your BIOS splash screen, you will have the option of pressing a special key. On most EFI computers, you’ll need to access EFI setup immediately after turning on your PC in order to see the option of turning on Legacy Boot, usually as an option under the boot options section of the BIOS configuration. On many computers, it isn’t necessary to enable Legacy Boot, but if you’re having trouble booting from a bootable CD/DVD or USB, then you’ll probably need to follow the instructions below to enable your PC or laptop to boot in Legacy Mode.Below are instructions for turning on Legacy Boot support on most PCs and laptops, as well as specific instructions for certain brands of laptops. Enabling Legacy Boot ModeOn PCs and laptops from most manufacturers, including Dell, HP, Asus, Acer, Toshiba, Lenovo, and more, Legacy Boot can be turned on or allowed from the EFI setup/configuration feature, available immediately after turning on your PC. The regular way of booting into software and operating systems (such as Windows XP or Vista, Linux, and recovery tools like ) is called “Legacy Boot” and must sometimes be explicitly enabled/allowed in the BIOS settings.

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