What to Do When Your PC Won’t Boot After a Windows 11 Update: A Guide for Beginners


How can I fix a PC that fails to boot after a Windows 11 update?

I attempted to install Windows 11 on my PC, but after the update process and a restart, the PC did not boot. The motherboard LED indicators alternated between CPU and DRAM errors. I tried various troubleshooting steps, such as resetting the CMOS, removing the battery, testing different RAM modules and slots, but none of them worked. I suspected that the motherboard might be damaged by the update, but when I connected the SSD to another PC, the update resumed normally. What could be the cause of this problem and how can I resolve it?


Windows 11 is the latest operating system from Microsoft, which promises to offer a new user interface, improved performance, and enhanced security. However, some users have reported that their PCs failed to boot after installing Windows 11, leaving them with a black screen and motherboard error codes. This article will explain what might cause this issue and how to fix it.

What causes the PC to fail to boot after a Windows 11 update?

There are several possible reasons why a PC might fail to boot after a Windows 11 update, such as:

  • Incompatible hardware: Windows 11 has higher hardware requirements than previous versions of Windows, such as a TPM 2.0 chip, a 64-bit processor, and at least 4 GB of RAM. If your PC does not meet these specifications, it might not be able to run Windows 11 properly, and the update process might corrupt some system files or drivers.
  • Faulty BIOS settings: The BIOS (Basic Input/Output System) is the firmware that controls the communication between the hardware and the operating system. Sometimes, the BIOS settings might get changed or reset during the update process, causing the PC to fail to recognize the boot device, the CPU, or the RAM. This might result in the motherboard LED indicators flashing between CPU and DRAM errors.
  • Corrupted SSD: The SSD (Solid State Drive) is the storage device that holds the operating system and other files. If the SSD gets corrupted during the update process, the PC might not be able to access the boot sector, the partition table, or the file system. This might prevent the PC from loading Windows 11 or displaying any error messages.
  • How to fix the PC that fails to boot after a Windows 11 update?

    Depending on the cause of the problem, there are different ways to fix the PC that fails to boot after a Windows 11 update, such as:

  • Check the hardware compatibility: Before attempting to install Windows 11, you should check if your PC meets the minimum hardware requirements for the new operating system. You can use the [Windows PC Health Check app](https://www.microsoft.com/en-us/windows/windows-11#pchealthcheck) to scan your PC and see if it is eligible for the upgrade. If your PC is not compatible, you might need to upgrade some components or revert to your previous version of Windows.
  • Reset the BIOS settings: If the BIOS settings are the cause of the problem, you can try to reset them to their default values and see if that solves the issue. To do this, you need to access the BIOS menu by pressing a specific key (such as F2, F10, or Del) when the PC starts. Then, you can look for an option to load the default settings, save the changes, and exit the BIOS. Alternatively, you can also remove the CMOS battery from the motherboard for a few minutes and then reinsert it. This will clear the BIOS settings and restore them to their factory defaults.
  • Repair the SSD: If the SSD is corrupted, you might need to repair it using another PC or a bootable USB drive. To do this, you need to connect the SSD to another PC or insert the USB drive into the PC that fails to boot. Then, you need to boot from the other device and access the Windows Recovery Environment. From there, you can use the [Startup Repair](https://support.microsoft.com/en-us/windows/startup-repair-fixes-problems-that-keep-windows-from-loading-efc9f6ab-7e8c-4f7b-9f40-540ccf1d9c8f) tool to scan and fix any issues with the boot sector, the partition table, or the file system. You can also use the [Command Prompt](https://support.microsoft.com/en-us/windows/command-prompt-faq-064e1c41-9f4a-9dcf-9d48-5e9d0cfe59d4) to run some commands, such as [chkdsk](https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/chkdsk) or [bootrec](https://docs.microsoft.com/en-us/windows-hardware/drivers/devtest/bootrec), to repair the SSD manually.
  • Conclusion


11 is a major update that brings many new features and improvements to the PC experience. However, some users might encounter problems with their PCs failing to boot after installing Windows 11, due to incompatible hardware, faulty BIOS settings, or corrupted SSDs. Fortunately, there are ways to fix these issues and restore the PC to a working condition. By following the steps above, you might be able to solve the problem and enjoy Windows 11 on your PC.

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