To fix Windows 10 that will not boot, check power and display connections, open Windows Recovery Environment, and run Startup Repair. If startup failed after an update or driver change, try removing that update or restoring an earlier system state. Save reset and reinstallation for later, after preserving important files separately.
The short version
- Check the basics: Confirm power and display connections before treating a blank screen as a Windows boot failure.
- Open recovery: If automatic recovery does not appear, interrupt ordinary startup twice and allow the third startup to continue, without interrupting an update, reset, or installation.
- Repair first: Run Startup Repair, then try Safe Mode or undo the change that preceded the failure.
- Protect your files: Preserve important files separately before resetting or reinstalling Windows.
| Method | When it fits | Requirement or catch |
|---|---|---|
| Power and display checks | The screen stays blank | Check power, cables, and external displays |
| Graphics driver reset | Windows responds behind a blank screen | Requires Windows to process the shortcut |
| Display output change | Startup appears on the wrong screen | Requires a responsive Windows session |
| Dell peripheral check | A connected device may interfere with startup | Disconnect peripherals and retry |
| Dell residual power reset | Startup still fails after peripheral checks | Remove the battery only if removable |
| Recovery access | Windows cannot finish starting | Built-in recovery must function |
| Recovery or installation USB | Built-in recovery will not open | Requires compatible media |
| Startup Repair | Startup files or boot configuration may be damaged | Repairs some startup problems |
| Safe Mode | You need access to diagnostic tools | Networking depends on available drivers |
| Driver rollback | Failure followed a driver change | Requires administrator permissions and a previous driver |
| Driver update or reinstallation | You have identified a problematic device | Device Manager must open |
| Software removal | Failure followed an application installation | Some uninstallers do not work in Safe Mode |
| Startup application disabling | Trouble begins after sign-in | The desktop must be accessible |
| Quality update removal | Failure followed a Windows update | Some updates cannot be uninstalled |
| System Restore | A recent system change caused trouble | Requires an existing usable restore point |
| Dell hardware diagnostics | Hardware trouble is suspected | Requires a model with preboot diagnostics |
| Dell firmware checks | The drive or boot device may be missing | Firmware labels vary by model |
| Reset this PC | Earlier repairs failed | Removes applications and settings |
| Clean installation | You need to reinstall from USB | A complete wipe destroys files and recovery partitions |
Check power and the display first
Connect the PC to power and let a laptop battery charge. Check the monitor's power and video connections. Try another monitor or cable, or disconnect external displays from a laptop.
A powered laptop with a black screen may need power and display troubleshooting before Windows recovery. If Windows responds to keyboard shortcuts, press Windows + Ctrl + Shift + B to reset the graphics driver. A beep or screen flicker indicates a response; this shortcut cannot repair a failure before Windows loads.
For output going to the wrong display, press Windows + P, press P again, then press Enter to change display modes. This requires a responsive Windows session. If Windows still fails to start, continue to recovery.
On a Dell PC, disconnect USB drives, printers, and other peripherals, then retry startup. For a residual power reset, shut down, disconnect power, and remove the battery only if it is removable. Hold the power button for 15 to 20 seconds, reconnect power, and start the PC again.
Open Windows recovery
Windows can open its recovery environment automatically after repeated failed starts. To trigger it manually, start the PC and hold the power button until it shuts down when the Windows or manufacturer logo appears. Repeat once, then allow the third startup to continue and select Advanced options. Do not interrupt an update, reset, or installation to enter recovery.
If you can reach the sign-in screen or Start menu, hold Shift while selecting Power > Restart. When the desktop remains accessible, you can also access the Windows recovery environment through Settings. On Windows 10, open Start > Settings > Update & Security > Recovery, then under Advanced startup, select Restart now.
Recovery tools may request an administrator account password rather than your Windows Hello PIN. An encrypted PC may also request a BitLocker recovery key. On another device, open your Microsoft account recovery keys, sign in, match the recovery screen's key ID, and enter the corresponding 48-digit key.
Use a USB drive if recovery will not open
If recovery opens, continue to Startup Repair below. Otherwise, boot from a compatible recovery USB created beforehand, or use a working PC to create Windows 10 installation media. For installation media, you need a blank USB drive with at least 8 GB of space, and creation erases the selected drive.
Open Microsoft's Windows 10 download page. Under Create Windows 10 installation media, select Download Now, run the Media Creation Tool as administrator, and select Accept. Select Create installation media for another PC > Next, choose the target language, edition, and architecture, then select USB flash drive. The public tool provides Windows 10 22H2 media and excludes Enterprise edition.
Boot the affected PC from the USB using its manufacturer's boot menu; the key varies by model. At Windows Setup, select Next > Repair your computer to reach recovery tools. You can then run Startup Repair, remove an update, or use System Restore to recover Windows using a USB drive.
Run Startup Repair
In recovery, select Troubleshoot > Advanced options > Startup Repair. Select Restart if offered, and provide the requested account credentials or BitLocker recovery key. The tool can repair some startup file and boot configuration problems.
Let the repair finish, then check whether Windows starts normally. For additional help with its screens, follow the steps to use Startup Repair for boot problems. If repair fails, try Safe Mode or the recovery option matching the change immediately before the failure.
Try Safe Mode and fix recent changes
From recovery, select Troubleshoot > Advanced options > Startup Settings > Restart. Press 4 or F4 for Enable Safe Mode, or press 5 or F5 for Enable Safe Mode with Networking. Networking depends on the drivers available in that session.
If Safe Mode opens and the failure followed a driver change, right-click Start and select Device Manager. Expand the device category, open the device's Properties, select Driver, then choose Roll Back Driver. Rollback requires administrator permissions and an available previous driver.
For a recent display driver problem, you can also find and update your graphics driver when Windows or Safe Mode permits the tools to run. In Device Manager, right-click the device, select Update driver, then choose the option to search automatically. To reinstall an identified problematic device, right-click it, select Uninstall device > Uninstall, then restart.
Once normal Windows starts, remove recently installed software that coincided with the failure. On Windows 10, open Start > Settings > Apps > Apps & features, select the application, then select Uninstall. Individual uninstallers may not work in Safe Mode, so try System Restore if you cannot remove the suspect application there.
If trouble begins after sign-in and the desktop is accessible, stop suspect apps opening on startup. Open Task Manager, select the Startup tab, select the application, then select Disable. This affects sign-in applications rather than firmware or boot loader failures. If Safe Mode cannot open, return to recovery and try undoing a recent update or system change.
Undo an update or restore an earlier system state
When startup failed immediately after a Windows update, open Troubleshoot > Advanced options > Uninstall Updates in recovery. Select Uninstall latest quality update and complete the uninstall prompts. Some updates cannot be uninstalled, so try System Restore if removal cannot proceed or does not resolve startup.
For a recent driver, application, or system change, select Troubleshoot > Advanced options > System Restore. Choose an existing restore point, selecting Show more restore points if necessary. Optionally, select Scan for affected programs to review the changes before continuing.
Select Next > Finish, then select Restart after restoration. System Restore preserves personal files but can undo system, driver, and application changes made after the selected point. You need an existing usable Windows restore point to proceed. If none is available or restoration fails, check for hardware trouble before moving to reset.
Check for hardware trouble before resetting
On a Dell PC with preboot diagnostics, repeatedly press F12 during startup, select Diagnostics, then press Enter. Run the assessment and record any error code, validation code, and Service Tag. These diagnostics work without Windows starting.
To check drive detection on a Dell PC, press F2 during power-on. Look under Storage or General > System Information for the drive. Check General > Boot Sequence or Boot Configuration > Boot Sequence, and restore the intended Windows boot device or order. Firmware labels vary by model.
An undetected or failed drive needs hardware attention, with connection checks performed using the model's service manual. Boot file, storage driver, and registry repairs can also require technician work after simpler recovery options fail. Avoid applying a generic boot command sequence without identifying the Windows installation and boot layout first. For a managed PC, contact your IT department.
Reset or reinstall Windows after protecting files
If the earlier repairs fail, preserve important files separately before resetting. In recovery, select Troubleshoot > Reset this PC, then choose Keep my files. This reinstalls Windows while preserving personal files, but removes installed applications and settings.
Choose Cloud download or Local reinstall when offered, then complete the displayed prompts. Cloud download requires an internet connection and a Windows 10 version that offers it. Review how to reset Windows while keeping files before proceeding.
Select Remove everything only when you intend to delete personal files, applications, and settings. Choose Cloud download or Local reinstall when offered, review the removal settings, and complete the reset prompts. If reset fails, follow the troubleshooting for a Windows PC that will not reset.
A clean installation is a later option, and a complete wipe destroys the target disk's files and recovery partitions. Boot compatible Windows 10 installation media, choose the language and keyboard settings, then select Next > Install now. Supply a product key or use the digital license option, and select your licensed edition.
Select I accept the license terms, then select Next > Custom: Install Windows only (advanced). For a complete wipe, delete partitions only on the verified target disk, selecting OK when prompted. Select the target Unallocated Space, then select Next.
Frequently Asked Questions
Why does pressing F8 not open Safe Mode?
Windows 10 ignores F8 during startup under its default Standard boot menu policy. Open Windows Recovery Environment and use Startup Settings to select Safe Mode.
Can you repair Windows while keeping installed apps?
Yes, if normal Windows can run Setup and you have installation media with a compatible edition and language. Connect the media, open its drive in File Explorer, run setup.exe, and select Yes. Select Change what to keep > Keep personal files and apps > Next > Install. Booting from the USB does not provide this app-preserving repair route.
What if Windows keeps returning to Safe Mode?
When the configuration utility is accessible, press Windows + R, enter msconfig, and select OK. Open Boot, uncheck Safe boot, select Apply, and restart.
Why does restarting work when starting after shutdown fails?
Windows Fast Startup can contribute to a shutdown and startup problem because it does not affect restarting. When Windows runs and the option is available, open Control Panel > Power Options > Choose what the power buttons do > Change settings that are currently unavailable. Uncheck Turn on fast startup (recommended), select Save changes, then shut down and start again.
Can a recovery USB replace a backup of personal files?
No, a Windows Recovery Drive excludes personal files, even when you select Back up system files to the recovery drive. Keep a separate copy of important files, and remember that creating the recovery drive erases the selected USB.