Issues with disk, UEFI, secure boot, or MBR.Faulty Windows 11 ISO file downloaded or the Insider preview build has problems.Either the PC is incompatible with Windows 11 or does not meet system requirements.
The external hard drive is attached to the PC.Here we list down the most common ones that will help you understand the reason behind the blocked Windows 11 installation task. The error can be caused due to multiple reasons. Reasons for Windows 11 Installation Failed However, before we learn how to troubleshoot the error, let us narrow down the reasons that cause the installation of Windows 11 to fail. Luckily, the problem is fixable, and you can do it on your own by following the steps mentioned below. While trying to install the Windows update, are you encountering Windows 11 installation has failed error? If so, you are not alone several other users have reported facing a similar problem.