![]() If the Windows installation medium does not enjoy boot priority, please set CD-ROM or removable device as the first boot device. If the disk you want to start Windows 10/8/7 from is not the first boot device, please set it as the first boot device. Generally, you can find boot order or boot sequence in “ Boot“, “ Startup“, or similar tab:īut sometimes, it is under “ Advanced BIOS Features“: ![]() Or reconnect the installation media if the “Reboot and select proper boot device or insert boot media in selected boot device and press a key” error appears when you are installing Windows 10/8/7 to your ASUS, Toshiba, Acer, Gigabyte, etc. If the disk where you want to start Windows isn’t here, shut down your computer, reconnect the hard disk, use another cable, or connect from another SATA slot. Then, under the Main or another tab, you’ll find all devices detected by BIOS. You can find the exact key from the internet. Please boot or reboot your computer and repeatedly press on F2, Del, Esc, or another required key to enter BIOS before Windows is loaded. If Windows asks you to insert boot device and press any key, you could check whether the boot disk or installation media is detected by BIOS, which should be the first step. Check Whether The Boot Drive Is Detected by BIOS or Not In addition, aiming at different users, it gives different solutions. Luckily, the following tutorial shows what attempts should be done at first. Therefore, you need to do a lot of attempts. With knowing the exact cause for this error, you could take the corresponding measure, but it’s not easy to find the exact cause from all possible causes. How to Quickly Fix “Reboot and Select Proper Boot Device” Error Windows 10/8/7 If you find one, please share it in Comment part so as to help more people. ![]() Of course, there might be other causes for this error. These are all possible causes we found, which could guide us to fix the issue. The operating system on boot disk corrupted.Master Boot Record( MBR) is damaged or corrupted. ![]() The partition saving Windows boot files should be the very active partition.
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