Windows ERROR_402 is one of those frustrating errors that can interrupt your workflow and leave you scratching your head. Whether you encountered it during software installation, a system update, or while launching an application, this error typically relates to licensing problems or issues with system file access. Don’t worry—this detailed step-by-step guide will help you understand the cause of ERROR_402 and fix it effectively, bringing your system back to smooth operation.
What is Windows ERROR_402?
Windows ERROR_402, formally known as ERROR_PAYMENT_REQUIRED (with the numeric code 402), indicates that an operation cannot be completed because payment or license authorization is required. In practical terms, this means your Windows system or an application is blocked due to licensing restrictions or corrupted system files that are preventing proper verification.
Common Causes of Windows ERROR_402
- Problems with software licensing or activation
- Corrupted or missing system files
- Issues with Windows Update components
- Conflicts with third-party software (especially security apps)
- Malware or system infection affecting licensing components
Step-by-Step Troubleshooting Guide to Fix Windows ERROR_402
Step 1: Restart Your Computer
Before diving into deeper troubleshooting, sometimes a simple restart can clear temporary glitches.
- Click Start > Power > Restart
- Once rebooted, retry the operation that caused ERROR_402.
Step 2: Check Your Windows Activation Status
Because ERROR_402 is often license-related, confirm your Windows activation.
- Press Windows Key + I to open Settings.
- Navigate to Update & Security > Activation.
- Check if Windows shows as Activated.
- If it states Windows is not activated, follow prompts to activate it or troubleshoot activation.
If your system is not activated, that’s likely the root cause. Consider purchasing a valid license or contacting Microsoft support.
Step 3: Run the Windows Activation Troubleshooter
Windows includes a built-in troubleshooter to address activation problems.
- Open Settings > Update & Security > Activation.
- If activation isn’t successful, look for the Troubleshoot option and click it.
- Follow the on-screen instructions.
This tool can automatically detect and fix many licensing-related issues.
Step 4: Run System File Checker (SFC) and DISM Tools
Corrupted system files can cause ERROR_402 by interrupting license validation processes.
- Press Windows Key + X, then select Windows Terminal (Admin) or Command Prompt (Admin).
-
Type the following command and press Enter:
sfc /scannow
- Wait patiently for the scan to complete and follow any suggested repairs.
-
Next, run DISM to repair system image:
DISM /Online /Cleanup-Image /RestoreHealth
- After completion, restart your PC and check if the error persists.
Step 5: Disable or Temporarily Uninstall Third-Party Security Software
Antivirus or firewall apps can sometimes interfere with licensing checks or Windows updates.
- Temporarily disable your antivirus/firewall software.
- Retry the operation causing ERROR_402.
- If successful, add the affected program or Windows components to the antivirus exception list.
- Remember to re-enable your security software afterwards.
Step 6: Check for Windows Updates and Install Them
Missing critical updates can trigger errors.
- Go to Settings > Update & Security > Windows Update.
- Click Check for updates and install all available updates.
- Restart your PC if prompted.
Step 7: Perform a Clean Boot
Conflicts with background programs can cause ERROR_402 to appear.
- Press Windows Key + R, type
msconfig, and hit Enter. - Go to the Services tab.
- Check the box for Hide all Microsoft services, then click Disable all.
- Next, open Task Manager, go to the Startup tab, and disable all startup items.
- Restart your PC.
- Try the operation again. If the error disappears, identify and enable services/startup items one by one to isolate the cause.
Step 8: Scan for Malware
Malware can disrupt system licensing files or network access.
- Use Windows Defender or a trusted third-party anti-malware tool.
- Perform a full system scan.
- Quarantine or remove any detected threats.
- Restart your system and verify if the error is fixed.
Step 9: Contact Microsoft Support or Software Vendor
If none of the above steps work, it’s time to reach out for professional help.
- Visit Microsoft Support.
- Provide details about ERROR_402 and what you’ve tried.
- If the error is related to third-party software, contact the software vendor for licensing assistance.
Pro Tips to Prevent ERROR_402 in the Future
- Always use genuine Windows licenses and software.
- Keep your system and applications updated.
- Maintain robust antivirus and malware protection.
- Avoid software piracy or unauthorized license activation tools.
- Backup your system regularly.
Final Thoughts
Encountering Windows ERROR_402 can be a stumbling block, especially when you need your PC to work flawlessly. But with patience and the right steps, you can troubleshoot and resolve this error effectively. Remember, errors like this often stem from licensing issues or system integrity problems, which Windows provides tools to diagnose and fix.
If you found this guide helpful, don’t hesitate to share it with friends or colleagues, and stay tuned for more easy-to-follow tech solutions!
Have questions or want to share your experience fixing ERROR_402? Drop a comment below – we’d love to hear from you!
