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How to Fix Windows Won’t Boot: Step-by-Step Troubleshooting Guide

Introduction

A non-booting Windows PC can be a nightmare, especially when deadlines loom or critical files are at stake. While frustrating, most boot issues stem from software corruption, hardware glitches, or misconfigured settings. This guide walks you through proven troubleshooting steps to revive your system.

Common Causes of Windows Boot Failure

  • Corrupted system files or bootloader
  • Faulty hardware (e.g., hard drive, RAM)
  • Recent driver or update conflicts
  • Incorrect BIOS/UEFI settings
  • Virus or malware attacks

Step-by-Step Fixes for Windows Boot Issues

1. Check Hardware Connections
  • Unplug peripherals (USB drives, printers).
  • Ensure power cables, RAM, and hard drives are securely connected.
  • Test with a different power cable or drive if possible.
2. Use Windows Startup Repair
  1. Boot from a Windows Installation USB (created via Microsoft’s Media Creation Tool).
  2. Select Repair your computer > Troubleshoot > Startup Repair.
  3. Let Windows diagnose and fix boot errors automatically.
Startup Repair Interface
3. Rebuild Boot Configuration Data (BCD)
  1. In Advanced Startup Options, open Command Prompt.
  2. Run these commands sequentially:
   bootrec /fixmbr  
   bootrec /fixboot  
   bootrec /scanos  
   bootrec /rebuildbcd
4. Run System File Checker (SFC)
  • In Command Prompt, type:
  sfc /scannow
  • This scans and repairs corrupted system files.
5. Check Disk for Errors
  • Use the chkdsk command to fix disk issues:
  chkdsk /f /r C:
  • Replace C: with your OS drive letter.
6. Restore from a System Restore Point
  1. Go to Troubleshoot > Advanced Options > System Restore.
  2. Choose a restore point before the issue began.
7. Reset or Reinstall Windows
  • Reset: Keep files but reinstall Windows (Troubleshoot > Reset this PC).
  • Clean Install: Backup data, then reinstall Windows via USB.

Video Tutorial

For visual learners, watch this step-by-step video:
How to Fix a Windows PC That Won’t Boot

Prevent Future Boot Problems

  • Regularly update Windows and drivers.
  • Use antivirus software to block malware.
  • Create a recovery drive for emergencies.

FAQs

Q: Can I recover data if Windows won’t boot?
A: Yes! Use a bootable USB or connect the drive to another PC.

Q: How do I access BIOS/UEFI?
A: Restart and press F2, Delete, or F12 (varies by manufacturer).

Q: Do I need a Windows installation USB?
A: It’s recommended. Create one via Microsoft’s Media Creation Tool.

Conclusion

Most Windows boot issues are fixable with patience and the right tools. Start with Startup Repair or BCD rebuilds before opting for a reset. If hardware fails, consult a professional.

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