“An operating system wasn’t found” error when booting Windows
Symptoms When trying to boot Windows, you receive the error: An operating system wasn’t found. Try disconnecting any drives that don’t contain an operating system. Press Ctrl+Alt+Del …
Surface turns on and shows "Couldn't find a bootable operating system"
When you turn on your Surface, it displays the following message: Couldn't find a bootable operating System. Check the Boot Configuration to try to fix this. On older devices, the Surface …
Surface Go or Surface Go 2 turns on and shows "No Bootable …
If your Surface Go or Surface Go 2 turns on and you see a black screen that says No Bootable Device, do the following steps. Solution 1: Fix the issue using a USB drive Before you start …
Use Bootrec.exe in the Windows RE to troubleshoot startup issues
Describes how to use the Bootrec.exe tool to troubleshoot and repair startup issues in Windows Vista and Windows 7.
You receive error: Stop error code 0x0000007B (INACCESSIBLE_BOOT_DEVICE ...
Resolution To fix this error, follow the methods below. If the first method doesn't resolve this issue, proceed to the next method. Method 1: Use the Last Known Good Configuration to start …
"Boot failed" error message when you start a UEFI-enabled …
Jul 13, 2010 · Cause This issue occurs because the boot manager compares two device signatures incorrectly. These device signatures are the Extensible Firmware Interface (EFI) …
How to recover devices from an unbootable state after installing the ...
Feb 13, 2018 · Provides agents resolution steps for restoring a device in a no-boot state after installing a January 2018 security update
Unmountable Boot Volume - Microsoft Support
Author: Soumitra Sengupta MVP COMMUNITY SOLUTIONS CONTENT DISCLAIMER MICROSOFT CORPORATION AND/OR ITS RESPECTIVE SUPPLIERS MAKE NO …
"Bootmgr is missing Press Ctrl+Alt+Del to restart" error when …
Describes how to troubleshoot the error message "Bootmgr is missing Press Ctrl+Alt+Del to restart" that may occur when you try to start Windows.
Windows 11 and Secure Boot - Microsoft Support
Learn how to change settings to enable Secure Boot if you are not able to upgrade to Windows 11 because your PC is not currently Secure Boot capable.