WerFault.exe Application Error Fix

WerFault.exe application error usually means Windows Error Reporting is reacting to another crash, not that WerFault.exe itself is broken. The Microsoft-signed file is normally safe in C:\Windows\System32 or C:\Windows\SysWOW64. If the message appears once, close or update the failed app. If it returns at startup, creates a high-CPU loop, or runs from a user folder, find the crashing app first, repair Windows components, then scan suspicious copies before deleting anything.

What is WerFault.exe?

WerFault.exe belongs to Windows Error Reporting (WER), the Windows component that gathers information about application crashes, hangs, and system faults. Microsoft describes WER as an event-based feedback infrastructure that can collect problem details and offer available solutions for hardware and software issues [1].

That means WerFault.exe is often a messenger, not the root cause. When a browser, game, driver utility, Office app, shell component, or malware-related process crashes repeatedly, WerFault.exe may be the window you notice even though another program caused the failure.

What the WerFault.exe error usually means

Check whether WerFault.exe is the real Windows file

1. Open Task Manager, right-click WerFault.exe, and choose Open file location.
2. Expected locations are C:\Windows\System32 and, on 64-bit Windows, C:\Windows\SysWOW64.
3. Right-click the file, open Properties, and check Digital Signatures. A legitimate copy should be signed by Microsoft.
4. If the file is in AppData, Temp, Downloads, a browser cache folder, or a random startup folder, scan it before deleting anything.

Malware can imitate Windows process names or abuse legitimate reporting tools after a crash. The filename alone is not enough; path, signature, parent process, command line, and persistence tell the real story.

How to fix WerFault.exe application error in Windows 10/11

1. Find the app that is actually crashing

Start with the crash source. Press Windows key, type Reliability Monitor, and open View reliability history. Look for red failure marks at the time the WerFault.exe message appeared. The failed application name is more useful than the WerFault.exe window title.

You can also open Event Viewer → Windows Logs → Application and filter for Error. Look for entries around the same time with fields such as Faulting application name, Faulting module name, and Exception code. Repair, update, or reinstall that application first.

2. Restart Windows Error Reporting safely

If the same report keeps looping, restart the reporting service instead of deleting system files.

1. Press Windows key + R, type services.msc, and press Enter.
2. Find Windows Error Reporting Service.
3. Right-click it and choose Restart. If it is stopped, start it and keep the startup type at the Windows default.
4. Reboot and check whether the message returns.

Disabling Windows Error Reporting can hide the symptom, but it does not fix the crashing app. Use it only as a short diagnostic step when a support engineer specifically asks for it.

3. Repair Windows files with DISM and SFC

Microsoft recommends using DISM and System File Checker when Windows files may be missing or corrupted [2]. Open Command Prompt or Terminal as administrator and run:

DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow

Run DISM first, then SFC. Restart Windows after the scans finish. If SFC reports that it repaired files, test the app that triggered the WerFault.exe error again.

4. Update Windows, drivers, and the crashing app

Open Settings → Windows Update and install pending updates. Then update the application named in Reliability Monitor or Event Viewer. If the crash started after a GPU, audio, printer, VPN, or chipset driver update, install the latest vendor driver or roll back that driver in Device Manager.

5. Use clean boot to isolate startup software

When the error appears at startup or every few minutes, a background service or startup app may be crashing. Microsoft’s clean boot process starts Windows with a minimal set of drivers and startup programs so you can isolate the interfering software [3].

1. Press Windows key + R, type msconfig, and press Enter.
2. On the Services tab, select Hide all Microsoft services, then disable non-Microsoft services.
3. Open Task Manager from the Startup tab and disable non-essential startup apps.
4. Restart and test. If the WerFault.exe loop stops, re-enable items in small groups until the faulty one appears.

6. Scan for malware if the path or behavior is suspicious

WerFault.exe is legitimate when it is the Microsoft-signed Windows file, but malware can crash repeatedly, imitate the name, or use Windows tools to blend into normal activity. Scan when you see a wrong file path, an unknown parent process, repeated outbound blocks, strange scheduled tasks, or the error returning after you remove an app.

Before cleanup, write down the file path, parent process, scheduled task name, and any security-tool alert. Gridinsoft Anti-Malware can help check whether the WerFault.exe message is only a side effect of a broken app or part of a broader infection.

If you are comparing WerFault.exe with other trusted Windows utilities that malware can abuse, the RegAsm.exe safe path guide and the mshta.exe malware removal guide show the same path-signature-launcher approach.

7. Use Repair Mode only when Windows itself is unstable

Use Windows Recovery Environment when Settings, Task Manager, or core apps will not open, or when WerFault.exe errors appear together with boot failures. Hold Shift while selecting Restart, then choose Troubleshoot → Advanced options. Start with Startup Repair, System Restore, or Uninstall Updates before using command-line boot repairs.

What not to do

• Do not delete the Microsoft-signed WerFault.exe from System32 or SysWOW64.
• Do not download a replacement WerFault.exe from random file sites.
• Do not treat disabling Windows Error Reporting as a full fix.
• Do not ignore a recurring error from an unsigned copy in a user folder.
• Do not run boot repair commands unless Windows is actually failing to boot.

If the faulting app is Taskmgr.exe and the crash began after installing Claude Desktop, check our Claude Desktop and Task Manager crash guide before treating WerFault.exe as the problem.

FAQ

References

1. Microsoft. “About WER.” Microsoft Learn, accessed June 6, 2026. https://learn.microsoft.com/en-us/windows/win32/wer/about-wer
2. Microsoft. “Using System File Checker in Windows.” Microsoft Support, accessed June 6, 2026. https://support.microsoft.com/en-us/windows/using-system-file-checker-in-windows-365e0031-36b1-6031-f804-8fd86e0ef4ca
3. Microsoft. “How to perform a clean boot in Windows.” Microsoft Support, accessed June 6, 2026. https://support.microsoft.com/en-us/help/929135/how-to-perform-a-clean-boot-in-windows