How to fix Windows blue screen on boot

You press the power button and wait for Windows™ to start—but instead of your desktop, you’re staring at a blue screen with an error message. It’s called a Blue Screen of Death (or BSOD), and while it sounds scary, it’s usually fixable.

At Asurion, we help people troubleshoot tech problems like this every day—from failed boots to frozen updates. Here’s how to fix the Windows blue screen on boot and get your computer running again. If at any time during the process you want help, visit your nearest uBreakiFix® by Asurion store for a free diagnostic.

What causes a blue screen on startup?

A blue screen at boot usually means Windows encountered a critical error during startup. Common causes include:

• Corrupted system files.
• Faulty drivers or recent hardware changes.
• Failed Windows updates.
• Hard drive or memory issues.
• Conflicting apps or startup programs.

These issues can feel overwhelming, but most of them have straightforward solutions. Let’s walk through the steps to get your PC back up and running.

Step 1: Restart your computer

Sometimes, the blue screen is a one-time event. Restart your PC to see if it boots normally. If it doesn’t, continue with the steps below.

Step 2: Boot into Safe Mode

Safe Mode starts Windows with only the essential drivers and services.

Windows will typically launch Automatic Repair after a few failed startup attempts. To trigger this:

1. Turn your PC on, then press and hold the Power button to force a shutdown.
2. Do this 2–3 times until Windows launches Automatic Repair.
3. Select Advanced options > Startup Settings > Restart.
4. Press F4 to boot into Safe Mode.

If Safe Mode works, the problem is likely related to a driver, app, or startup process.

Step 3: Uninstall recent updates or apps

If the problem started after a recent update or app install:

While in Safe Mode, open Settings > Windows Update > Update history, then click on Uninstall updates to remove the most recent ones. You can also go to Settings > Apps to remove new programs.

Step 4: Run System File Checker

This built-in tool scans and repairs corrupted Windows files.

In Safe Mode, search for Command Prompt, then right-click on it and select Run as administrator. Type sfc /scannow and press Enter. Let the scan complete and follow any repair instructions.

Step 5: Check your hardware

If you recently added new hardware, remove it and try booting again. Faulty RAM or drives can cause blue screens during startup.

• Check for loose cables.
• Run a memory test by typing Windows Memory Diagnostic into the Start menu and following the prompts.

Step 6: Use System Restore

If you have a restore point from before the issue started:

Boot into Advanced startup > Troubleshoot > System Restore. Follow the prompts to roll back your system.

Step 7: Reset your PC

If all else fails, you can reset your PC without losing your personal files.

Go to Advanced startup > Troubleshoot > Reset this PC. Choose Keep my files, then follow the steps to reinstall Windows.

FAQ

What is a blue screen on boot?

It’s a critical Windows error that stops your system from loading. It usually appears with a STOP code or QR code on a blue background.

Can I fix a blue screen without losing data?

Yes. In most cases, Safe Mode, System Restore, or a reset using Keep my files can fix the issue without deleting your files.

Why does my PC show a blue screen after an update?

Some updates can conflict with drivers or other software. Uninstalling the update or rolling back drivers often resolves it.

Is a blue screen always a hardware problem?

Not always. It can be software-related, especially if it happens after an app or update. But repeated crashes could indicate failing hardware.