Windows 11 KB5101650 Causing Black Screen, Secure Boot Errors, or 0xc0430001? Here’s How to Fix It

Windows 11 cumulative update KB5101650 was supposed to improve security, add new features, and make Windows more reliable. However, for some users, the July 2026 Patch Tuesday update is doing the exact opposite. Shortly after installing the update, several users reported that their PCs failed to boot normally, Windows stuck with a black screen, a Blue Screen of Death (BSOD), a BitLocker recovery prompt, or an error saying the operating system loader failed Secure Boot verification.

The problem doesn’t affect every Windows 11 PC, but reports are increasing, especially from users with HP laptops. Some systems enter recovery mode immediately after installing KB5101650, while others get stuck in an endless reboot loop or display error 0xc0430001 during startup. A few users have also reported Secure Boot-related errors that prevent Windows from loading properly.

If your PC stopped working after installing KB5101650, don’t worry you may no need to reinstall Windows. In this guide, we’ll explain why these problems occur, which PCs are affected, and the step-by-step solutions that can help you boot into Windows again and resolve the error.

What Problems Does Windows 11 KB5101650 Cause?

Based on user reports, Windows 11 KB5101650 can cause different startup problems depending on your PC model and configuration. While many users installed the update without any issues, others found that their computers no longer boot normally after restarting.

Here are the most commonly reported problems:

• Black Screen after installing KB5101650, where Windows never reaches the sign-in screen.
• Blue Screen of Death (BSOD) during startup, forcing the PC to restart repeatedly.
• BitLocker Recovery screen asking for the recovery key after the update.
• Secure Boot verification error stating that the operating system loader failed signature verification.
• Error 0xc0430001 appears during startup on some affected PCs.
• Endless reboot loops, where Windows repeatedly restarts without loading the desktop.

Most reports so far involve HP laptops, although similar issues have also been reported on a small number of other Windows 11 PCs. At the time of writing, Microsoft has not officially confirmed these as widespread issues, so they appear to affect only certain hardware or firmware configurations rather than every Windows 11 device.

Why Is KB5101650 Causing Boot Problems?

Microsoft hasn’t officially confirmed the exact cause of these startup problems. However, based on user reports, the issue appears to be related to Secure Boot, BitLocker, or your PC’s BIOS/UEFI firmware.

The June 2026 update includes security improvements that interact with your computer’s boot process. On some PCs, especially certain HP laptops, these changes may not work correctly with older BIOS versions or existing Secure Boot settings. As a result, Windows may fail to verify the boot files, causing the system to enter recovery mode, display a Secure Boot error, or get stuck in a reboot loop.

It’s important to note that KB5101650 is not causing these problems on every Windows 11 PC. Many users installed the update successfully without any issues. So far, the reports suggest that the problem affects only certain hardware models or system configurations.

Fix 1: Uninstall KB5101650 from Windows Recovery

If your PC started showing a black screen, BSOD, or boot errors immediately after installing KB5101650, removing the update is the first thing you should try. Windows Recovery Environment (WinRE) lets you uninstall the latest quality update even if Windows won’t start normally.

Here’s how:

1. Turn on your PC, then interrupt the boot process 3 times by holding the power button when the Windows logo appears. Windows should automatically load Automatic Repair.
2. Select Advanced options > Troubleshoot > Advanced options.
3. Click Uninstall Updates.
4. Choose Uninstall latest quality update.
5. Follow the on-screen instructions and let Windows remove KB5101650.
6. Restart your computer.

If the update was causing the startup problem, your PC should boot normally after the uninstall is complete.

Note: If Windows starts successfully after removing KB5101650, pause Windows Update for a few days until Microsoft or your PC manufacturer provides a fix or updated guidance.

Fix 2: Enter Your BitLocker Recovery Key

Some users report that, after installing KB5101650, Windows boots directly to the BitLocker Recovery screen instead of the desktop. This usually happens because the update changes something that BitLocker considers part of your PC’s startup environment.

If you see a message asking for your BitLocker recovery key, don’t panic. Your files are still encrypted and safe you just need to enter the correct recovery key to continue.

To find your BitLocker recovery key:

• Visit https://aka.ms/myrecoverykey from another device and sign in with the Microsoft account linked to your PC.
• If your device is managed by your workplace or school, contact your IT administrator.
• If you printed or saved the recovery key when BitLocker was enabled, use that copy.

After entering the recovery key, Windows should continue booting normally. Once you’re back on the desktop, check for a BIOS update from your PC manufacturer and install any newer Windows updates that may address the issue.

Tip: If your PC repeatedly asks for the BitLocker recovery key after every restart, continue with the next troubleshooting methods below, as the problem may be related to Secure Boot or your system firmware.

Fix 3: Update Your BIOS and Check Secure Boot Settings

If your PC displays a message such as “The operating system loader failed Secure Boot verification” after installing KB5101650, the issue may be related to your BIOS/UEFI firmware rather than Windows itself.

Several users have reported that updating the BIOS resolved the issue, especially on certain HP laptops. A BIOS update can improve compatibility with the latest Windows security changes and Secure Boot certificates.

Here’s what you can do:

1. If you can access Windows, visit your PC manufacturer’s support website and download the latest BIOS update for your model.
2. Install the BIOS update by following the manufacturer’s instructions.
3. Restart your PC and check if Windows boots normally.

If you can’t boot into Windows, you may need to use another computer to download the BIOS update or contact your PC manufacturer’s support for recovery options.

What about disabling Secure Boot?

Some users have temporarily disabled Secure Boot to get their PCs working again. While this has helped in a few cases, it should only be used as a temporary troubleshooting step. Secure Boot is an important security feature, and you should turn it back on after updating your BIOS or resolving the startup problem.

Important: Don’t change BIOS settings unless you’re comfortable doing so. Incorrect settings can prevent your PC from starting properly. If you’re unsure, it’s safer to try the other fixes in this guide first.

Fix 4: Run Startup Repair

If uninstalling KB5101650 didn’t solve the problem, Windows includes a built-in Startup Repair tool that can automatically fix common boot issues.

To run Startup Repair:

1. Turn on your PC and interrupt the boot process three times until Automatic Repair appears.
2. Select Advanced options > Troubleshoot > Advanced options.
3. Click Startup Repair.
4. Select your Windows installation and let Windows scan for startup problems.
5. Restart your PC after the repair is complete.

Startup Repair checks for missing or damaged boot files and attempts to repair them automatically. Depending on the issue, the process may take several minutes.

If Windows still won’t boot after Startup Repair finishes, don’t worry. There are a few more troubleshooting methods you can try before considering a full Windows reinstall.

Fix 5: Use System Restore

If your PC was working fine before installing KB5101650, you may be able to restore Windows to an earlier state using System Restore. This won’t delete your personal files, but it will remove recently installed updates, drivers, and system changes that may be causing the startup problem.

Here’s how:

1. Boot into Windows Recovery Environment.
2. Select Advanced options > Troubleshoot > Advanced options.
3. Click System Restore.
4. Choose your Windows account and enter your password if prompted.
5. Select a restore point created before installing KB5101650.
6. Follow the on-screen instructions to restore your PC.

The restoration process may take several minutes, and your computer will restart automatically when it’s finished.

Note: This option is available only if System Restore was enabled before the problem occurred. If you don’t see any restore points, continue with the next solution.

Fix 6: Repair Windows Using Installation Media

If none of the above solutions work, you can try repairing Windows using a bootable Windows 11 USB drive. This can fix damaged system files and boot problems without deleting your personal files.

Here’s how:

1. Create a Windows 11 installation USB using another working computer.
2. Insert the USB drive into the affected PC and boot from it.
3. When the Windows Setup screen appears, select your language and click Next.
4. Click Repair your computer instead of Install now.
5. Go to Troubleshoot > Advanced options.

From here, you can try:

• Startup Repair to automatically fix boot issues.
• Command Prompt to repair Windows system files using advanced commands.
• System Restore, if a restore point is available.
• Uninstall Updates if you haven’t already removed KB5101650.

If Windows still won’t boot after trying these recovery options, you may need to perform a clean installation of Windows 11. Be sure to back up your important files first, if possible.

Final Thoughts

While KB5101650 installs without any issues on most Windows 11 PCs, a small number of users have reported black screens, BSODs, BitLocker recovery prompts, Secure Boot errors, and boot loops after installing the update. The issue appears to be limited to certain hardware and firmware configurations, with many reports coming from HP laptop users.

If your PC is affected, start by uninstalling the latest quality update, then work through the other fixes in this guide. In many cases, you can recover your system without reinstalling Windows. Microsoft may also release additional guidance or a future update to address these startup problems, so it’s worth keeping an eye on new Windows Update releases.