How to fix “The system call level is not correct. [ERROR_INVALID_LEVEL (0x7C)]” – Error Code 124

Overview

In this article, we’ll focus on resolving the issue described as: “The system call level is not correct. [ERROR_INVALID_LEVEL (0x7C)]”. This error, identified by the error code Error Code 124, can impede your system’s performance, and here’s how you can fix it.

Identifying the Problem

Error Code 124 occurs when a program or service attempts to make a system call at a level that’s not permitted. This can happen for several reasons, including:

• Corrupted or outdated system files
• Incorrect permissions on registry keys or files
• Third-party software conflicts
• Driver issues

Common Fixes

1. Run System File Checker (SFC)

SFC is a utility that scans and repairs corrupted system files. To run SFC:

1. Press Win key + R to open Run.
2. Type “cmd” and press Ctrl + Shift + Enter to open an elevated Command Prompt.
3. Type “sfc /scannow” and press Enter.

2. Update Device Drivers

Outdated device drivers can also cause Error Code 124. To update drivers:

1. Press Win key + X and click Device Manager.
2. Expand the category of the device with the issue.
3. Right-click the device and select Update driver.

3. Reset Windows Update Components

Corrupted Windows Update components can trigger Error Code 124. To reset them:

1. Press Win key + R to open Run.
2. Type “services.msc” and press Enter.
3. Right-click Windows Update and select Stop.
4. Navigate to C:\Windows\SoftwareDistribution and delete all files and folders.
5. Return to the Services window and start Windows Update.

4. Disable Fast Startup

Fast Startup can sometimes lead to Error Code 124. To disable it:

1. Press Win key + X and click Control Panel.
2. Go to Power Options.
3. Click “Choose what the power buttons do.”
4. Uncheck “Turn on fast startup (recommended).”

Advanced Troubleshooting

1. Check Registry Permissions

Incorrect permissions on registry keys can result in Error Code 124. To check permissions:

1. Press Win key + R to open Run.
2. Type “regedit” and press Enter.
3. Navigate to the registry key that’s causing the issue.
4. Right-click the key and select Properties.
5. Go to the Security tab and make sure Administrators have Full Control.

2. Repair or Reset Windows

If other solutions fail, you may need to repair or reset Windows:

• Repair Windows:
• Press Win key + I to open Settings.
• Go to Update & Security > Recovery.
• Click “Get started” under Reset this PC.
• Select “Keep my files.”
• Reset Windows:
• Follow steps 1-3 above.
• Select “Remove everything.”

Conclusion

Error Code 124 can be a frustrating issue, but it’s usually resolvable by following the solutions outlined in this article. To prevent this error in the future, ensure your system files are updated, drivers are current, and avoid making any unauthorized changes to your system.