1. Home
  2. Microsoft
  3. Windows
  4. How to Fix Windows ERROR_430: Step-by-Step Troubleshooting Guide

How to Fix Windows ERROR_430: Step-by-Step Troubleshooting Guide


If you’ve encountered Windows ERROR_430, you’re not alone. This error can crop up for various reasons and can be a real headache if left unaddressed. But don’t worry—this detailed, easy-to-follow guide will walk you through exactly how to troubleshoot and fix this pesky error on your Windows PC.


What Is Windows ERROR_430?

Before jumping into solutions, it’s helpful to understand what this error means.

  • ERROR_430 is a system-level error code that typically indicates a “Class Factory Cannot Supply Request” problem.
  • It usually occurs when a program or process tries to access a COM object or ActiveX component that is either missing, corrupted, or improperly registered in the system.
  • You may see this error during software installation, launching certain applications, or running scripts that depend on specific Windows components.


Why Do You See ERROR_430? Common Causes

  • Corrupt or missing DLL or OCX files
  • Faulty registration of COM/ActiveX components
  • Conflicting software or malware
  • Corrupted Windows system files
  • Incomplete software installation

Knowing the root cause helps you decide the right fix path.


Step-by-Step Guide to Fix Windows ERROR_430

Step 1: Restart Your PC

Yes, the simplest first step can often solve the issue. A restart clears temporary glitches and refreshes your system.

  1. Click Start > Power > Restart.
  2. Try running the program again that caused the error.

If ERROR_430 persists, move to Step 2.


Step 2: Re-register the Problematic DLL or OCX File

Since ERROR_430 involves COM components, re-registering associated DLL/OCX files often fixes it.

  1. Identify the specific DLL or OCX file causing the problem (often mentioned in the error message).
  2. Open Command Prompt as Administrator:

    • Search cmd in the Start menu.
    • Right-click Command Prompt and select Run as administrator.
  3. In the Command Prompt window, type the following command and press Enter:

    regsvr32 filename.dll

    Replace filename.dll with the actual file name (or .ocx file). For example:

    regsvr32 mscomctl.ocx

  4. You should receive a success message. Restart your PC and check if the error is resolved.


Step 3: Run System File Checker (SFC)

Corrupted Windows system files can cause ERROR_430. The SFC utility scans and repairs these files.

  1. Open Command Prompt as Administrator (see Step 2).
  2. Type the following command and press Enter:

    sfc /scannow

  3. Wait while Windows scans and fixes corrupted system files.
  4. Restart your PC after completion and test the affected software.


Step 4: Perform a Clean Boot

Sometimes third-party software conflicts cause ERROR_430.

  1. Press Windows + R, type msconfig, and press Enter.
  2. In the System Configuration window, go to the Services tab.
  3. Check Hide all Microsoft services.
  4. Click Disable all.
  5. Switch to the Startup tab and click Open Task Manager.
  6. Disable all startup items.
  7. Close Task Manager and click OK in System Configuration.
  8. Restart your PC and test the issue again.

If the error disappears, a startup program was the culprit. Gradually enable services and startup items to find the offender.


Step 5: Scan for Malware

Malware infections can corrupt system components and cause this error.

  • Use Windows Defender or a trusted third-party antivirus to perform a full system scan.
  • Remove any threats found and reboot your PC before retrying.


Step 6: Update Windows and Drivers

Keeping your system updated often resolves compatibility issues.

  1. Go to Settings > Update & Security > Windows Update.
  2. Click Check for updates, install any available.
  3. Update device drivers (especially for related software/hardware) via Device Manager.


Step 7: Reinstall the Program Causing ERROR_430

If the error happens only with one software:

  1. Uninstall the program via Control Panel > Programs and Features.
  2. Reboot your PC.
  3. Download the latest version from the official website.
  4. Reinstall and check if the error persists.


Step 8: Restore Windows to an Earlier Point

If all else fails, use System Restore to revert your PC to a previous working state.

  1. Press Windows + R, type rstrui, and hit Enter.
  2. Follow the wizard to choose a restore point before the error began.
  3. Confirm and start the restore, which will reboot your PC.


Step 9: Seek Professional Help

If you’ve tried all the above and ERROR_430 is still haunting you, it might be time to consult with a professional technician. There might be deeper underlying hardware or system corruption issues.


Final Thoughts

ERROR_430 can be frustrating but is usually fixable with patience and a methodical approach. Start with simple steps like restarting and re-registering files, then move up to system scans and clean boots.

Remember, backing up your data regularly is a good practice to avoid data loss when troubleshooting system errors.


FAQs About Windows ERROR_430

Q: Can a virus cause ERROR_430?
A: Yes, malware can corrupt COM components and cause this error.

Q: Is ERROR_430 dangerous?
A: It generally doesn’t indicate a critical hardware failure but can disrupt programs relying on certain components.

Q: Can I fix ERROR_430 on my own?
A: Most users can fix it by following the step-by-step guide above.


By following this comprehensive troubleshooting guide, you’ll likely resolve Windows ERROR_430 and get your system back to running smoothly. If you found this guide helpful, share it with friends or colleagues facing similar issues!


Happy troubleshooting!

Updated on June 20, 2025
Was this article helpful?

Related Articles

Leave a Comment