Home / boot device missing or boot failed Boot device missing or boot failed 02/04/2021 What reasons the error default boot device absent or boot failed? How to settle this default boot lacking error? We analyzed numerous posts and what we have learned is provided below. This short article from MiniDevice will certainly present you the remedies and also provide a item of software to ago up documents routinely.What Causes Default Boot Device Missing or Boot Failed on Lenovo/Acer?Some Lenovo and Acer computer users say that they come across the error default boot gadget absent or boot failed as soon as booting the computer system. The boot missing or boot failed error is a Windows startup error that appears once a computer system or lapheight fails to uncover or load the Windows boot papers and the error message is presented as the following picture:The default boot device missing or boot failed error might be led to by various reasons, such as:The boot sequence or order is incorrect.BIOS settings are incorrect.The hard drive might have failed.Missing boot files.