Fix 0x00000021 QUOTA_UNDERFLOW Error

In this article, I will discuss how to fix the 0x00000021 QUOTA_UNDERFLOW error.

Startup Repair and System Files Fix

Computer with repair tools

Startup Repair: If you are experiencing the 0x00000021 QUOTA_UNDERFLOW error, one of the first steps you can take is to run Startup Repair. This tool can help fix issues with booting up your computer and resolve any system file errors that may be causing the error.

System Files Fix: To address the 0x00000021 error, you can also try repairing your system files. Use the Command Prompt to run the System File Checker tool to scan for and repair corrupted files that may be triggering the error.

Additional Steps: If the above methods do not resolve the issue, consider running a full system scan with your antivirus software to check for any malware that may be causing the error. You can also try using System Restore to revert your system to a previous state before the error occurred.

Update Windows and Drivers

Windows update screen

  • Check for Windows Updates to ensure your operating system is up-to-date.
  • Update Device Drivers for any hardware components experiencing issues.
  • Use the Device Manager to identify outdated drivers.
  • Visit the manufacturer’s website to download and install the latest drivers.
  • Consider using a driver update tool for automated assistance.
  • Reboot your system after updating drivers to apply changes.
    Consider using a driver update tool for automated assistance.
Reboot your system after updating drivers to apply changes.

Virus and Malware Scan

After running the virus and malware scan, reboot your computer to see if the error persists. Sometimes a simple reboot can resolve the issue by clearing out any temporary glitches or bugs that may have caused the error.

If the error still persists after running the scan and rebooting, you may need to consider other troubleshooting steps such as checking for software bugs or corrupted system files. Use the Command Prompt or Windows PowerShell to run system file checker (sfc /scannow) to check for and repair any corrupted files that may be causing the error.

Remove Junk Files and Problematic Updates

To fix the 0x00000021 QUOTA_UNDERFLOW error, remove junk files and problematic updates that may be causing the issue. Start by running a disk cleanup to get rid of unnecessary files that could be affecting your system’s performance. Next, uninstall any recent updates that may have triggered the error.

After clearing out junk files and problematic updates, run a full system scan with your antivirus software to check for any potential viruses or malware that could be causing the error. Make sure your antivirus software is up to date to effectively detect and remove any threats.

If the issue persists, try performing a System Restore to revert your system back to a previous point in time when it was functioning properly. This can help undo any changes that may have led to the error.

BSOD and Hardware Troubleshooting

To troubleshoot the 0x00000021 QUOTA_UNDERFLOW error, first check for any recent hardware changes or updates that may have caused the issue.

Restart your computer in Safe Mode by pressing F8 during boot-up and selecting the option from the menu.

Once in Safe Mode, check for any hardware malfunctions by running diagnostics tests.

If the error persists, try updating your device drivers by accessing the Device Manager through the Control Panel.

If the issue is not resolved, consider performing a System Restore to revert your computer to a previous working state.

For advanced troubleshooting, you can use the Command Prompt to run system scans and repair corrupted files.

Check Disk and RAM for Errors

Next, check your RAM for errors by using the Windows Memory Diagnostic tool. Press the Windows key + R, type “mdsched.exe” in the Run dialog box, and press Enter. Follow the on-screen instructions to scan your RAM for any issues.

After checking both disk and RAM for errors, restart your computer to see if the 0x00000021 QUOTA_UNDERFLOW error is resolved. If the issue persists, consider seeking further assistance from a professional or referring to Microsoft’s support website for additional troubleshooting steps.

System Restore and Data Recovery

Data Recovery: If System Restore does not resolve the issue, you may need to consider data recovery options. You can use third-party data recovery software to recover any lost or corrupted files on your computer. Make sure to back up your important files before attempting any data recovery to avoid permanent data loss.

Professional Help: If you are unable to resolve the 0x00000021 QUOTA_UNDERFLOW error on your own, consider seeking help from a professional computer technician. They can diagnose the issue and provide a solution tailored to your specific situation.

FAQs

How do I fix stop code 0xc000021a?

To fix stop code 0xc000021a, you can start by running the SFC tool, Windows Defender Antivirus Tool, updating or uninstalling device drivers, uninstalling problematic Windows updates, running the CHKDSK command, uninstalling incompatible software, and performing a system restore.

How do I stop getting stop codes?

To stop getting stop codes, you can update your drivers or revert to a previous version. Check for any damaged system files and ensure your drivers are functioning properly to prevent this issue from occurring again.

How do I fix registry error stop code?

To fix a registry error stop code, you can update your Windows PC to the latest version, return to a previous restore point, test automatic maintenance, update your system, boot into Safe Mode, unplug unnecessary devices, and update all device drivers on your computer manually or automatically.

Was this article helpful?
YesNo
Scroll to Top