If you are unable to boot into your Windows 7/8/10 operating system due to corrupted Boot Configuration Data (BCD) file or your boot menu is not showing all the installed operating systems, you need to repair the BCD config file.

In case your Boot Configuration Data file has been already corrupted, this article will help you to repair it by using the appropriate commands.

After releasing the Windows 10 October 2018 Update on 2nd October 2018, Microsoft stopped distributing the update over the Windows Update channel as well as via Media Creation tool, due to users reported personal data files missing issues.

If you are one of the affected user, STOP using your system immediately and contact Microsoft support as mentioned below to help you recover those lost files.