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To troubleshoot a recurring Windows 11 blue screen, first record the exact stop code and any module named after “What failed,” then note what changed shortly before the first crash. These clues help narrow the cause, but no stop code by itself proves that a particular part is faulty. Microsoft says unexpected restarts can stem from hardware, a device driver, or software. Windows 11 version 24H2 and later may show a black stop-error screen instead of a blue one. Microsoft’s stop-error guidance covers both.
Why does my Windows 11 PC keep getting a blue screen?
A stop error means Windows encountered a serious problem and shut down or restarted. The screen may be called a blue screen, black screen, bug check, kernel error, or BSOD; the color and wording can vary by Windows version. A stop code is a useful clue, not a diagnosis: hardware, drivers, or software may be involved.
Before changing anything, write down the stop code exactly and the module name, if one appears after “What failed.” Note whether the first crash followed a new device, driver or application installation, or Windows update. That timing can help you choose which reversible change to undo first. Do not buy replacement RAM, storage, or a graphics card based only on a generic stop code.
How do I fix a Windows 11 stop code error if the PC still starts?
Try the lower-risk checks first. If normal startup is unreliable, go to the Safe Mode steps below and perform the checks there. Microsoft’s recommended basic troubleshooting sequence is to remove recently added hardware, inspect Device Manager, check free space, and install available Windows updates. Microsoft’s detailed steps explain this sequence.
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- Remove recently added hardware. Shut down, disconnect a device added shortly before the crashes, then restart. If the crashes stop, the timing points to a possible device or driver issue, but further diagnosis may still be needed.
- Check Device Manager. Right-click Start and open Device Manager. Look for a device with an exclamation-point warning. Try updating its driver; if that does not help, Microsoft suggests disabling or uninstalling the device as a test. Avoid third-party driver-updater utilities.
- Check available disk space. Open Settings > System > Storage. Microsoft suggests keeping 10% to 15% of the drive free as a useful target; the exact need varies with system configuration because Windows and applications use free space for swap files and other operations. This is guidance, not a fixed minimum.
- Install Windows updates. Open Settings > Windows Update, select Check for updates, and install available updates. Restart if prompted.
How to use Safe Mode to narrow down the cause
Safe Mode starts Windows with a limited set of essential services and drivers. If the crash does not recur there, that narrows the possibilities but does not identify the exact cause.
- Open Windows Recovery Environment (WinRE). If Windows starts, hold Shift while selecting Power > Restart from the sign-in screen or Start menu. If it cannot start reliably, interrupt startup by holding the power button to shut down as Windows begins loading; repeat this startup interruption until WinRE appears. If that does not work, use Windows installation media to reach recovery tools.
- In WinRE, select Troubleshoot > Advanced options > Startup Settings > Restart.
- After the PC restarts to Startup Settings, choose the Safe Mode option shown on screen, typically by pressing 4 or F4 for Safe Mode, or 5 or F5 for Safe Mode with Networking.
Microsoft documents the Safe Mode choices and recovery route in its Windows Startup Settings guide and WinRE guide.
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What diagnostic clues can I collect?
Logs and built-in diagnostics can add evidence, but they are not guaranteed repairs.
- Check Event Viewer: Search Start for Event Viewer, open it, and inspect Windows Logs > System for errors around the crash time. Correlate the time and event details with the stop code and recent changes rather than treating one log entry as proof of a failed component.
- Run Windows Memory Diagnostic: Search Start for Windows Memory Diagnostic, choose the restart-and-check option, and let the test run. After Windows starts again, open Event Viewer and look for a
MemoryDiagnostics-Resultsentry to review the outcome. - Use dump analysis only if appropriate: Memory-dump analysis can provide deeper clues for IT professionals and developers; it may require specialist knowledge to interpret.
Microsoft describes these evidence-gathering steps in Resolving Blue Screen errors in Windows.
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What if a specific stop code points to hardware?
Some codes provide a more focused lead. For WHEA_UNCORRECTABLE_ERROR, Microsoft advises trying Windows Update for drivers first. Manually update the implicated device only when the error gives an indication of which hardware device is involved. The code still does not establish which physical component has failed. See Microsoft’s WHEA_UNCORRECTABLE_ERROR guidance.
If a diagnostic test or repeated, specific symptom points to hardware trouble, contact the device manufacturer or a qualified repair service. Preserve important data first where possible. For a work- or school-managed PC, contact your IT department if recovery does not resolve the problem.
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Which recovery option should I choose?
If Windows still starts, begin with a rollback or restore related to the timing of the first crash before considering a reset. If Windows cannot reach sign-in or is stuck restarting, use WinRE tools. Back up important files before recovery actions whenever possible; some choices can affect apps, settings, or data. Microsoft’s Windows recovery options vary by Windows version and availability.
| Option | When it may fit | Impact and availability |
|---|---|---|
| Uninstall a recent update | Crashes began after a Windows update and Windows will not start reliably. | Available through recovery options where supported; reverses a recent update rather than resetting the PC. |
| System Restore | The problem followed a system change and a suitable restore point exists. | Rolls back system files and settings, but not personal files. |
| Reinstall the current Windows version while preserving files, apps, and settings | Windows still starts and less disruptive fixes have not worked. | Available on Windows 11 version 22H2 or later when the option is offered. |
| Point-in-time restore | A suitable restore point in time is available for the issue. | Available on Windows 11 version 24H2 or later where offered. |
| Reset this PC | Other suitable options have failed. | More disruptive; review the reset choices and their data impact before proceeding. |
What if Windows cannot start or keeps restarting?
Use WinRE, which includes tools such as Startup Repair, Startup Settings, Command Prompt, uninstall updates, and UEFI firmware settings. You can reach it through repeated interrupted startups, Windows recovery prompts, or Windows installation media. A USB flash drive can be used for installation or recovery media if needed; it is a way to access recovery tools, not a fix for the underlying cause.
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- Enhanced Functionality: Packed with handy features, including a 5x9" precision tracking mouse pad and a built-in phone slot for seamless work or video calls. Plus, enjoy laptop support with the integrated device ledge.
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Try Startup Repair
In WinRE, select Troubleshoot > Advanced options > Startup Repair and follow the prompts. Startup Repair automatically checks for and attempts to repair certain startup problems, including missing or damaged system files, corrupted boot configuration data, a damaged master boot record, incompatible drivers, and registry errors. It may not resolve every blue screen. Microsoft’s Startup Repair instructions explain the tool and note that encrypted devices may require the BitLocker recovery key.
Consider Quick Machine Recovery on supported systems
On Windows 11 version 24H2 or later, Quick Machine Recovery can detect repeated startup failures related to a known widespread issue and check Windows Update for a Microsoft-provided fix. Microsoft says it is enabled by default on Windows 11 Home; Pro and Enterprise may require an administrator to enable it. It is a targeted startup-recovery feature, not a general solution for every stop error. See Microsoft’s Quick Machine Recovery guide.
Protect data before reset or reinstall
If Windows can still start, copy important files to a separate location before attempting more disruptive recovery. If it cannot start, consider whether your files are backed up and whether BitLocker encryption may require a recovery key to access recovery actions or data. Review the selected option’s consequences before confirming a reset or reinstall; do not assume all recovery choices preserve the same files, apps, and settings.
When should I get expert help?
Seek manufacturer support or qualified repair when a diagnostic or consistent symptom points to a physical hardware fault, or when the PC remains in a restart loop after appropriate recovery steps. Avoid replacing components based on a stop code alone. If this is a managed work or school device, ask IT for help rather than making changes that could affect organizational settings.
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