How to Fix Wuthering Waves Fatal Error Line 677: 5 Proven PC Troubleshooting Steps

Published On - February 19, 2026

Emily Harris

Wuthering Waves is an action-packed RPG that has captivated players with its fluid combat and immersive world. However, nothing shatters immersion faster than a sudden crash—especially one accompanied by the dreaded Fatal Error Line 677. If you’ve encountered this issue on PC, you’re not alone. This guide walks you through exactly what it means and how to fix it quickly and effectively.

TL;DR: Wuthering Waves Fatal Error Line 677 is usually triggered by corrupted game files, outdated drivers, missing system components, or conflicts with background software. Start by verifying game files, updating GPU drivers, and installing the latest Visual C++ Redistributables. If that doesn’t work, disable overlays and run the game as administrator. In most cases, one of these five proven fixes resolves the crash.

What Is Wuthering Waves Fatal Error Line 677?

The Fatal Error Line 677 message typically appears when the game client fails to execute a crucial function. This can be caused by:

  • Corrupted or missing game files
  • Outdated graphics drivers
  • Conflicts with third-party programs
  • Missing Windows components
  • Insufficient system permissions

While the error message may look technical and intimidating, the underlying issue is often straightforward. Below are five proven PC troubleshooting steps that address the most common causes.

1. Verify and Repair Game Files

Corrupted or incomplete game files are one of the leading causes of Fatal Error Line 677. Luckily, most launchers provide a built-in repair option.

Image not found in postmeta

How to Verify Game Files

  1. Open the Wuthering Waves launcher.
  2. Locate the Settings or Repair option.
  3. Select Verify File Integrity or similar.
  4. Wait for the scan to complete.
  5. Restart your PC before launching the game again.

This process checks installed files against official server versions and automatically replaces damaged data. Many players report this fix alone resolves the crash.

Pro tip: Avoid interrupting the verification process, as doing so may create additional file corruption.

2. Update Your Graphics Drivers

Modern games like Wuthering Waves rely heavily on up-to-date GPU drivers. An outdated or incompatible driver can trigger Fatal Error Line 677.

Why GPU Drivers Matter

Graphics drivers act as translators between your hardware and the game engine. If they’re outdated, the game may attempt to execute instructions the driver cannot properly process.

Steps to Update Drivers

  • For NVIDIA users: Open GeForce Experience and click Check for Updates.
  • For AMD users: Use AMD Adrenalin Software.
  • Alternatively, visit the official NVIDIA or AMD website and download the latest version manually.
  • Install the update and restart your computer.

If the issue started after a recent driver update, consider performing a clean installation or rolling back to a previous stable version.

3. Install or Repair Microsoft Visual C++ Redistributables

Many PC games depend on Microsoft Visual C++ Redistributables to run properly. If these components are missing or corrupted, Fatal Error Line 677 may appear at launch.

How to Fix It

  1. Press Win + R and type appwiz.cpl.
  2. Locate all Microsoft Visual C++ Redistributable entries.
  3. Select each and click Repair.
  4. If repair isn’t available, uninstall and reinstall the latest versions from Microsoft’s official website.

Make sure you install both:

  • x64 version
  • x86 version

Even if your system is 64-bit, some game components may still rely on 32-bit libraries.

After reinstalling, reboot your PC before launching the game.

4. Disable Background Overlays and Conflicting Software

Overlay applications are common culprits behind game crashes. Software such as Discord, NVIDIA ShadowPlay, Steam Overlay, and even certain antivirus programs can interfere with Wuthering Waves.

Common Programs to Disable

  • Discord Overlay
  • Steam Overlay
  • NVIDIA ShadowPlay
  • MSI Afterburner
  • Razer Synapse
  • Third-party antivirus software

How to Disable Overlays

Discord:

  1. Open Discord.
  2. Go to User Settings.
  3. Select Game Overlay.
  4. Toggle Enable in-game overlay off.

Steam:

  1. Right-click Wuthering Waves in your library.
  2. Select Properties.
  3. Uncheck Enable the Steam Overlay while in-game.

You can also press Ctrl + Shift + Esc to open Task Manager and temporarily disable unnecessary startup applications.

Tip: Perform a clean boot if you suspect deeper software conflicts. This launches Windows with minimal background services and can pinpoint the source of interference.

5. Run the Game as Administrator and Adjust Compatibility Settings

If the game lacks proper system permissions, it may crash during initialization, resulting in Fatal Error Line 677.

Run as Administrator

  1. Navigate to the Wuthering Waves installation folder.
  2. Right-click the game executable file.
  3. Select Properties.
  4. Go to the Compatibility tab.
  5. Check Run this program as an administrator.
  6. Click Apply and OK.

Adjust Compatibility Mode (Optional)

If crashes persist:

  • Enable Compatibility Mode.
  • Select Windows 8 or Windows 7.
  • Test the game launch.

Although designed for modern systems, certain configurations respond better when compatibility adjustments are applied.

Bonus Fix: Check System Requirements and Hardware Stability

While less common, hardware instability can trigger fatal errors. Ensure your PC meets the minimum and recommended requirements for Wuthering Waves.

Minimum System Considerations

  • Modern quad-core CPU
  • At least 16GB RAM
  • Dedicated GPU with DirectX 12 support
  • SSD storage (recommended)

Additionally:

  • Monitor temperatures using software like HWMonitor.
  • Ensure your system is not overclocked beyond stable limits.
  • Run Windows Update to install pending patches.

Overheating or unstable RAM can produce crashes that mimic software-related fatal errors.

When to Reinstall the Game

If all five steps fail, performing a full reinstall may be necessary. Before reinstalling:

  • Uninstall the game completely.
  • Delete remaining files in the installation directory.
  • Restart your PC.
  • Download the latest installer from the official source.

Although time-consuming, a clean install eliminates deeply embedded corruption that file verification may miss.

Preventing Future Fatal Errors

To keep Wuthering Waves running smoothly long term:

  • Update GPU drivers regularly.
  • Avoid installing unverified third-party mods.
  • Keep Windows updated.
  • Maintain adequate disk space.
  • Perform periodic system maintenance.

Gaming stability often depends on proactive care rather than reactive troubleshooting.

Final Thoughts

Wuthering Waves Fatal Error Line 677 might look like a complex technical glitch, but in most cases, it stems from simple, fixable issues. Whether it’s corrupted files, outdated drivers, missing system libraries, or conflicting overlays, the five steps outlined above address the vast majority of crashes.

Start with file verification and driver updates—these alone solve the problem for many players. If necessary, move through repairs, software conflict checks, and permission adjustments systematically.

With a bit of patience and careful troubleshooting, you’ll be back exploring Solaris-3 and perfecting your combos in no time.

Stable system, updated drivers, clean background environment—that’s the formula for uninterrupted gameplay.