Fix 'This Site Is Not Secure' Error in Edge on Windows 11

Encountering the “This site is not secure” warning in Microsoft Edge on Windows 11 can be frustrating, especially when you’re trying to access important or trusted websites. This guide provides clear, step-by-step instructions to troubleshoot and fix this security warning, helping you browse safely and without interruptions. Before starting, ensure your Windows 11 system is up to date, and consider backing up your system or important data as a precaution.

What You’ll Need

Microsoft Edge browser (latest version recommended)
Stable internet connection
Administrator access to your Windows 11 device
Basic understanding of Windows settings and browser configurations

Step-by-Step

Update Your Windows and Edge Browser
Ensure Windows 11 and Microsoft Edge are fully updated. Go to Settings > Windows Update and click “Check for updates.” For Edge, open the browser, click the three dots > Help & Feedback > About Microsoft Edge. Install any available updates and restart your device.
Clear Browser Cache and Cookies
Over time, cached data can cause security warnings. In Edge, click the three dots > Settings > Privacy, Search, and Services. Under Clear browsing data, click “Choose what to clear.” Select “Cookies and other site data” and “Cached images and files,” then click “Clear now.”
Check Date and Time Settings
Incorrect system date and time can trigger security errors. Open Settings > Time & Language > Date & Time. Enable “Set time automatically” and “Set time zone automatically.” Confirm the date and time are correct.
Disable Browser Extensions
Some extensions, especially security or privacy tools, can interfere with HTTPS connections. Go to Edge Settings > Extensions. Temporarily disable all extensions by toggling them off. Restart Edge and revisit the site.
Try Accessing the Site in InPrivate Mode
Open a new InPrivate window (Ctrl + Shift + N). Visit the site again. If the warning disappears, the issue relates to cache, cookies, or extensions.
Check the Website’s SSL Certificate
Use online tools like SSL Labs’ SSL Server Test to verify the site’s SSL certificate validity. If the certificate is expired or improperly configured, contact the website administrator or avoid entering sensitive data.
Adjust Security Settings in Edge
Navigate to Settings > Privacy, Search, and Services. Under “Security,” lower the security level temporarily by toggling “Use secure DNS” or adjusting other related settings. Revisit the site to see if the warning persists. Remember to revert these settings afterward for safety.
Reset Edge Settings
If issues persist, reset Edge to default. Go to Settings > Reset Settings > Restore settings to their default values. Confirm and restart the browser, then try accessing the site again.
Check for System Malware or Security Software Conflicts
Run a full system scan with Windows Security or your preferred antivirus. Temporarily disable third-party security software to test if it’s blocking or interfering with HTTPS connections.

Common Mistakes

Ignoring updates for Windows or Edge, which can cause compatibility issues.
Disabling security features permanently instead of resetting or adjusting them temporarily.
Clearing cache without understanding that it might remove saved passwords or login info.
Visiting websites with invalid or expired SSL certificates without recognizing the security risk.
Disabling extensions without identifying which one causes the problem.

Tips

Always keep your system and browser updated to prevent security issues.
Use Incognito or InPrivate mode to test if the problem is related to cached data or extensions.
Verify the website’s SSL certificate using online tools to rule out server-side issues.
Re-enable security features after troubleshooting to maintain safe browsing habits.
If unsure about SSL certificates or security settings, consult with IT professionals or trusted sources.

Troubleshooting

If following the above steps doesn’t resolve the issue, consider the following troubleshooting tips:

Reset your network settings: Open Command Prompt as administrator and run commands like netsh int ip reset and netsh winsock reset. Restart your PC afterward.
Temporarily disable VPNs or proxy servers, as these can interfere with SSL validation.
Test the site on a different network or device to determine if the issue is network-specific.
Check Windows Event Viewer for security or network-related errors that can give clues about the problem.
If the site is your own, ensure your SSL certificate is correctly installed and not expired. Consider renewing or reissuing it if necessary.

Frequently Asked Questions

1. Why does this site say it’s not secure in Edge?

This warning appears if the website’s SSL certificate is invalid, expired, or not properly configured, or if your browser or system settings block the connection.

2. Can I ignore the warning and proceed to the site?

Only if you trust the site and understand the risks. It’s safer to fix the underlying issue rather than bypass security warnings.

3. How do I know if the SSL certificate is the problem?

Use online tools like SSL Labs to check the site’s SSL status. If the certificate is invalid or expired, the tool will show detailed issues.

4. Will resetting Edge delete my saved passwords or bookmarks?

No, resetting Edge restores browser settings to default but generally preserves your bookmarks and passwords if you sign in with a Microsoft account. However, backing up is recommended.

5. Is it safe to disable security features temporarily?

It can help troubleshoot but should be re-enabled immediately afterward. Never leave security features disabled for long periods.

6. What should I do if none of the solutions work?

Contact your IT support or the website administrator for further assistance, especially if it’s a website you trust but still shows the warning.

Fix ‘This Site Is Not Secure’ Error in Edge on Windows 11