How to Fix Windows 11 Installation Keeps Restarting After Reboot

If you’re trying to install or upgrade to Windows 11 and your PC keeps restarting after every reboot, you’re not alone. This issue can occur during setup, upgrade, or after applying feature updates. The system may enter an endless restart loop showing “Installing Windows 11” or “Configuring updates,” but never completes the process.

The problem is usually caused by incomplete installation files, BIOS misconfiguration, corrupted boot data, or driver conflicts. In this guide, we’ll walk you through how to fix Windows 11 installation that keeps restarting after reboot — so you can finish setup successfully.

Fix Windows 11 Installation Keeps Restarting After Reboot

You’ll need a Windows 11 PC or installation media (USB or ISO) to repair or reinstall Windows. If your system keeps looping and doesn’t boot properly, you can use a Windows 11 installation USB to access recovery tools.

Step 1: Disconnect External Devices

Before diving into complex fixes, disconnect all unnecessary peripherals — USB drives, external hard disks, printers, webcams, and other devices.

Sometimes Windows setup repeatedly restarts because it’s trying to initialize external hardware or reinstall device drivers.

1. Power off your PC completely.
2. Unplug all external devices except your keyboard, mouse, and display.
3. Restart and let the setup continue.

If the installation proceeds normally, you can reconnect devices one by one later.

Step 2: Remove Installation Media After First Reboot

If you’re installing Windows 11 using a USB drive or DVD, your PC might be booting from it repeatedly instead of switching to the internal drive.

1. Start the installation process normally from your USB installer.
2. After the first reboot (when the “Installing Windows” screen finishes), remove the USB drive immediately.
3. Allow the PC to boot from the hard drive instead.

This simple step fixes most endless restart loops during setup, as it prevents the system from re-triggering the installer every time it reboots.

Step 3: Check Boot Order in BIOS

If removing the installation media doesn’t help, check that your system is booting from the correct drive.

1. Restart your PC and press F2, Del, or Esc (depending on your motherboard) to enter the BIOS/UEFI setup.
2. Go to the Boot or Startup tab.
3. Ensure your internal drive (SSD/HDD) containing Windows 11 setup files is set as the first boot device.
4. Save changes and exit (usually F10).

This ensures that Windows boots from the installed system, not the installation media.

Step 4: Repair Boot Configuration Data (BCD)

Corrupted boot data can cause the Windows setup to restart endlessly. You can rebuild it using Command Prompt via recovery mode.

1. Boot from your Windows 11 installation USB.
2. On the setup screen, click Repair your computer → Troubleshoot → Advanced options → Command Prompt.
3. In the Command Prompt window, type the following commands one by one, pressing Enter after each: bootrec /fixmbr bootrec /fixboot bootrec /scanos bootrec /rebuildbcd
4. Once complete, type exit and restart your computer.

This will repair damaged boot records and allow Windows to resume installation correctly.

Step 5: Disable Automatic Restart on System Failure

Windows sometimes reboots automatically when it encounters an installation error, making it hard to see the real cause.

To prevent this and view the error screen:

1. Boot from your Windows installation USB.
2. Click Repair your computer → Troubleshoot → Advanced options → Startup Settings → Restart.
3. Press F9 to select Disable automatic restart after system failure.

Now, if Windows hits an error, it will stop on the blue screen and show the actual error code. You can note that error to identify the next steps.

Step 6: Update BIOS or UEFI Firmware

Outdated firmware can conflict with the Windows 11 installer, especially if Secure Boot or TPM is enabled.

1. Check your motherboard or laptop manufacturer’s website for the latest BIOS/UEFI update.
2. Follow their instructions to update your firmware.
3. After updating, reset BIOS to default settings and re-enable TPM and Secure Boot.

Then retry the installation — a newer BIOS often resolves compatibility and boot issues.

Step 7: Check Drive Configuration (AHCI vs RAID)

Incorrect storage configuration in BIOS can prevent Windows 11 from finishing installation.

1. Restart and enter BIOS.
2. Locate the SATA configuration or Storage mode section.
3. If it’s set to RAID, switch it to AHCI (unless you specifically need RAID).
4. Save changes and reboot.

Reinstall or continue setup — most consumer PCs should use AHCI for Windows 11.

Step 8: Use Safe Mode to Complete Installation

If your system keeps looping but boots far enough to show the Windows logo, try finishing the setup in Safe Mode.

1. Turn your PC on and off three times in a row when the Windows logo appears to force recovery mode.
2. Choose Advanced options → Startup Settings → Restart.
3. Press F4 to boot into Safe Mode.

Once in Safe Mode, Windows will skip certain drivers and services, allowing installation to finish cleanly. Afterward, reboot normally.

Step 9: Recreate the Installation Media

If you’re using an older or corrupted USB installer, the installation may loop endlessly. Recreate it from scratch.

1. Download the latest Windows 11 Media Creation Tool from Microsoft’s site.
2. Insert a blank 8GB or larger USB drive.
3. Run the tool and select Create installation media.
4. When finished, use the new USB to reinstall Windows.

This ensures you’re using the latest build with all the necessary setup files intact.

Step 10: Perform a Clean Installation (Last Resort)

If none of the above methods work, your system files or partitions may be too corrupted to repair. A clean install will fix it.

1. Boot from your Windows 11 installation USB.
2. On the setup screen, choose Custom: Install Windows only (advanced).
3. Delete all existing partitions on your system drive (be sure to back up important data first).
4. Click Next to install Windows on the unallocated space.

The installer will recreate system partitions and perform a clean installation without restarting in a loop.

Wrapping Up

If your Windows 11 installation keeps restarting after reboot, it’s usually due to a boot configuration error, incorrect BIOS settings, or corrupted installation media.

Start by removing the USB after the first restart and checking your boot order. If that doesn’t help, rebuild the boot records or recreate the installation media.

For persistent cases, Safe Mode or a clean install will almost always resolve the issue. Once setup completes successfully, remember to reconnect your devices, install drivers, and run Windows Update to ensure your system is fully stable.

With these steps, you can break the restart loop and complete your Windows 11 installation without frustration.