Windows BSOD Error 0x0000015A — FATAL_SYSTEM_ERROR Fix

What Does This Error Mean?

The 0x0000015A blue screen is a fatal system error meaning Windows encountered an unrecoverable problem. This is a catch-all critical crash that can have several causes. It most often results from corrupted system files, a failing hard drive, or deeply corrupted Windows.

Affected Models

Windows 10
Windows 11
Windows 8.1

Common Causes

Core Windows system files are corrupted or missing
A hard drive is failing and cannot read critical Windows files
A malware infection deleted or replaced essential system files
A Windows update failed partway through, leaving the system broken
RAM failure causing random data corruption in memory

How to Fix It

Boot from a Windows USB or DVD and choose 'Repair your computer'. Run Startup Repair first — it automatically fixes many critical startup issues.

Create Windows installation media on another PC using the free Microsoft Media Creation Tool if you do not have a bootable USB.
Run System File Checker offline from the recovery Command Prompt. Type: sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows

This repairs corrupted Windows files without needing Windows to be running. It is more thorough than running sfc inside Windows.
Run DISM from the recovery Command Prompt to repair the Windows image: DISM /Image:C:\ /Cleanup-Image /RestoreHealth

DISM repairs the Windows component store — the source of truth that SFC uses to repair files. Run DISM before SFC for best results.
Test your hard drive health by booting from a USB and running a diagnostic. Many drive manufacturers offer bootable diagnostic tools (Seagate SeaTools, WD Data Lifeguard, etc.).

A failing drive will fail these tests and show errors. If the drive is bad, replace it and reinstall Windows — no amount of software repair will fix a physically failing drive.
Try System Restore from the recovery menu. Go to Troubleshoot > Advanced Options > System Restore and pick the most recent restore point before the problem started.

System Restore does not touch your personal files. It only undoes system changes made since the restore point was created.

When to Call a Professional

If Windows cannot start at all and recovery tools do not help, take your PC to a technician. They can access your drive from a different system, recover your files, and perform a clean Windows reinstall. This error can sometimes signal a dying hard drive — do not delay getting help.

Frequently Asked Questions

Can I recover my files if Windows will not start?

Yes, in most cases. Boot from a Linux live USB (like Ubuntu) or connect your drive to another PC. You can usually read and copy your files even when Windows itself will not start. Do this before attempting any repairs that might overwrite your data.

Will Reset This PC fix this error?

In many cases, yes. From the Windows Recovery Environment, choose Troubleshoot > Reset This PC > Keep My Files. This reinstalls Windows while trying to preserve your personal files. However, if the hard drive itself is failing, no software reset will help long-term.

How is this different from the normal CRITICAL_PROCESS_DIED error?

Both are fatal crashes, but 0x000000EF (CRITICAL_PROCESS_DIED) specifically means a critical Windows process exited unexpectedly. The 0x0000015A FATAL_SYSTEM_ERROR is a broader catch-all for fatal conditions that do not fit a more specific category. Both require similar repair approaches.