Windows⏱️ 2 min read📅 2026-05-30

How to Fix Operating system not found Error – Operating system not found Operating System Not Found After Boot

Fix Operating System Not Found error on Windows by following this step-by-step guide to resolve issues and boot your PC successfully.

Quick Answer: Try the quick fix method first, then move on to more advanced troubleshooting steps if needed.

When you see the 'Operating system not found' error after booting your Windows PC, it's usually due to a corrupted or missing operating system file. This guide will walk you through common causes and step-by-step fixes to get your PC up and running again.

⚠️ Common Causes

  • Corrupted or missing Windows operating system file (e.g., ntldr.exe)
  • Faulty or outdated BIOS settings

🛠️ Step-by-Step Fixes

Method 1: Quick Fix

  1. Step 1: Boot your PC in Safe Mode by pressing the F8 key repeatedly during startup. If you can access Safe Mode, try running a System File Checker (SFC) scan to repair any corrupted files.
  2. Step 2: If the SFC scan doesn't resolve the issue, try booting your PC in Recovery Mode and performing a System Restore to an earlier point when Windows was functioning correctly.

💡 Conclusion

If the quick fix methods don't work, you may need to perform a more advanced troubleshooting process or seek professional assistance from a Windows technician. Remember to always back up your important files and data before attempting any fixes.

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