#Easy to boot error 21 windows 10
You'll have to enter the Command Prompt using your Windows 10 installation media, as per the steps in the previous section. Microsoft recommends exporting and rebuilding the BCD store (the place your boot data is kept). If neither of these fixes works, there is a third fix that you can attempt. Once the process completes, you can restart your computer, removing the Windows 10 installation media and booting as normal.Įxporting and Rebuilding the Master Boot Record Now, you must enter the following commands in order, pressing Enter each time: At this point, press Shift + F10 to open the Command Prompt. These are some of the common buttons, but it does vary between systems. Tap either F2, F10, F12, or ESC to enter the system boot menu. Insert the Windows 10 installation media, then switch your computer on. From there, you can repair the boot process manually, using the bootrec.exe tool. Once you have Windows 10 installation media ready, you can force your system to load the installation process. Now, save your BIOS settings, then restart your system.Īfter restarting your system, your operating system should load properly. Ensure your operating system hard drive is in the first boot position. The hard drive containing the operating system should be the first thing to load, and therefore should be Boot Option 1 or the BIOS equivalent. The second thing to check is its boot position. First, check your hard drive is on the list. In the device priority menu, you need to check for two things. The name varies between different motherboard manufacturers and the BIOS in use, but the menu content is the same. Check for a menu named Boot Device Priority, Boot Option Order, or similar. Once the BIOS loads, locate a menu or tab named Boot or similar.
The specific key differs between computers, but commonly used keys include F2, F10, DEL, and ESC. To check this, you'll have to enter the BIOS.ĭuring the boot process, you must press the BIOS/UEFI access key. From here, you can understand if the hard drive is the first thing your computer looks for when trying to load the operating system, or if something has replaced it. The next step is to check if your BIOS/UEFI recognizes your hard drive and your system boot order. If your hard drive is connected to the motherboard properly, you'll have to try a different fix. So, how can you fix the reboot and select proper boot device error? These aren't the only causes, but the root of a reboot and select proper device error usually relates to one of these areas. The reboot and select proper boot device error have a few possible causes: If the BIOS fails to recognize where the operating system is, it won't load. That's an extremely simplified version of events, but you get the gist of it. It then boots the operating system, and you arrive at the Windows 10 login screen. The "reboot and select proper boot device" error is your computer's way of telling you that it cannot find the operating system.ĭuring the boot process, your system BIOS/UEFI figures out which hard drive your operating system is on. What Is the Reboot and Select Proper Boot Device Error? Hold on, what does that even mean? The computer was working fine when you switched it off, and now it isn't working at all? If your system throws up the reboot and select proper device error, check out the fixes below. You switch your computer on, and an error appears: Reboot and Select Proper Boot Device. You're just settling down for a mega work session.
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