If you’ve encountered the Windows error code ERROR_122, which means “The data area passed to a system call is too small,” don’t worry—this guide will walk you through what it means and how to fix it. This error usually pops up when a Windows system call or an application receives a buffer or data structure smaller than expected, leading to failures.
Whether you’re a tech novice or a seasoned user, this detailed and easy-to-follow guide will help you troubleshoot and resolve this frustrating issue.
What Is ERROR_122?
Windows uses system calls to perform various low-level operations. When one of these calls receives a data buffer that’s too small for the required operation, Windows returns the error code 122. Common scenarios include:
- Problems during software installation or updates.
- Issues with hardware drivers.
- Corrupted system files or registry problems.
- Incompatible or outdated applications.
Now, let’s dive into practical fixes to get your system back on track.
Step-by-Step Fixes for Windows ERROR_122
1. Restart Your Computer
Before diving into deeper solutions, the golden rule of troubleshooting is to restart your PC. Sometimes, a simple reboot clears temporary glitches and frees up resources, which may resolve the error immediately.
2. Run System File Checker (SFC) and DISM
Corrupted or missing system files often cause errors like ERROR_122. Windows provides built-in tools to scan and repair these files.
How to run SFC and DISM:
- Press Windows + X and choose Windows Terminal (Admin) or Command Prompt (Admin).
-
In the terminal, type the following command and press Enter:
sfc /scannow
- Wait patiently while Windows scans and repairs corrupted system files.
-
After SFC completes, run the Deployment Imaging Service Management (DISM) tool:
DISM /Online /Cleanup-Image /RestoreHealth
- Once DISM finishes, restart your computer and check if the issue persists.
3. Check for Windows Updates
Microsoft regularly releases updates that fix bugs and improve system stability.
- Open Settings → Update & Security → Windows Update.
- Click Check for updates.
- Download and install any available updates.
- Restart your PC when prompted.
This might patch the underlying cause of the ERROR_122.
4. Update or Reinstall Problematic Drivers
Drivers play a key role in how your system communicates with hardware. Outdated or corrupted drivers can trigger system errors.
To update drivers:
- Press Windows + X and select Device Manager.
- Identify devices with a yellow warning sign (indicating driver issues).
- Right-click on the device and choose Update driver.
- Select Search automatically for updated driver software.
If updating doesn’t help, uninstall and reinstall the driver:
- Right-click the device, choose Uninstall device.
- Restart your PC — Windows will try to reinstall the driver automatically.
5. Increase Buffer Size in Application Settings (Advanced)
If you encounter this error consistently in a specific application, it may be trying to access or write data using a buffer size that’s too small.
- Check the application’s settings for configurable buffer or memory options.
- Consult the software’s documentation or support for recommended buffer size settings.
- Adjust the values cautiously, increasing the buffer size as needed.
Note: This step is more technical and applicable if you’re a developer or IT professional.
6. Perform a Clean Boot
Conflicting software or startup programs can sometimes cause this error. A clean boot helps isolate third-party software conflicts.
How to do a clean boot:
- Press Windows + R, type msconfig, and hit Enter.
- Go to the Services tab, check Hide all Microsoft services, then click Disable all.
- Switch to the Startup tab and click Open Task Manager.
- Disable all startup items.
- Close Task Manager and click OK in the System Configuration window.
- Restart your PC.
If the error disappears, re-enable services and startup programs one by one to identify the culprit.
7. Repair or Reinstall the Affected Application
If the error is tied to a specific program:
- Go to Settings → Apps → Apps & features.
- Find the problematic application, select it, and choose Modify or Repair if available.
- If not, uninstall the app completely, then download and install the latest version from the official site.
8. Check Your Registry (With Caution)
Sometimes, corrupt or incorrect registry entries cause this error.
- Open Registry Editor by pressing Windows + R, typing
regedit, and pressing Enter. - Backup the registry by clicking File → Export.
- Search for entries related to the failing application or service.
- Delete or correct invalid entries only if you’re confident; otherwise, seek expert help.
Warning: Editing the registry incorrectly can cause serious system problems. Proceed carefully.
9. Contact Microsoft Support or Professional Help
If none of the above steps fix the error, consider contacting Microsoft Support or a trusted IT professional. They can perform deeper diagnostics and repair.
Final Thoughts
ERROR_122: “The data area passed to a system call is too small” is a tricky Windows error but often fixable with systematic troubleshooting. Start with easy solutions like rebooting and running SFC, then move to driver updates and clean boots. Always keep your system and drivers updated to prevent such errors.
If this guide helped you, share it with friends or colleagues who might be facing the same issue. Feel free to leave your thoughts or questions below—I’m here to help!
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Happy troubleshooting!
— Your friendly Windows troubleshooter
