Ever since Java 7, Oracle has implemented a security check within the program to help with security.

As a result, some users are often encountering a Java Applet during a browsing session. If you attempt to load the Applet often results in an Application Blocked by Security Settings error.

These are the reasons when you are most likely to face Java security alerts in Windows:

  • The application or program is self-signed, unsigned, or not signed by the vendor.
  • The permission attributes are missing in the application.
  • You are either using a custom program or playing a game that uses Java.

Although these are some potential reasons that trigger the Java security alert. There are some false positives as well.

How to Run Windows 10 application blocked by Java Security?

Most of the users face Java security alerts while accessing some applications. There are various reasons behind the issue and you need to follow a few workarounds for them as well.

Here are the few solutions that you can follow to get rid of the Java security alert.

Steps to fix Java security alerts on PC

Solution 1: Configure the Java Security Settings

  1. First, you need to navigate to the Start menu, type Control Panel in the search box and hit the Enter button.
  2. Open the Control Panel that will now appear in the list of programs.
  3. Now change the view Small iconscontrol panel small icons
  4. Search for Java (32-bit) and click on it as you can see in the image.
  5.  You will now see Java Control Panel with various tabs, select the Security tab.
  6. The Security tab has two types of security settings, Very High and High. Change the security setting to Very High. Alternatively, you can also keep it to High to work easily on your system.
  7. At the bottom of the Window, you will see the Exception Site List option. Here you can add the sites that you want to enter in the list. The applications launched from those sites will be allowed to run. java security settings
  8. The Edit Site List button is available at the right side of the Window click on it.
  9. A new window will be opened, click the Add button to paste the desired links.
  10. You can allow access by entering the URL and domain names right under the Location field.
  11. Click OK and you are done. The application will no longer be blocked by Java Security.

You might need to add two to three domain names in order to get access to a specific Applet. If the issue still persists move on to the next solution.

Solution 2: Update your Java version

Sometimes, the security alerts appear when you need to update your Java version. The application will not work correctly until you update the latest version.

At this point, you can try the following steps:

  1. Navigate to the Java site and look for the version that is compatible with your PC.
  2. Download and install the update and check it resolved the issue.
  3. If not try updating the program, and browser, that you are currently using.

Head towards solution 3 if the above two solutions fail to help you.


Need help downloading Java 10 on your computer? Use this guide.


Solution 3: Install a new Certificate

If you are still not able to resolve the issue, there is a huge chance that the certificate of the app or the program is outdated. You are seeing the alert just because the certificate is not trusted or it’s not Java signed.

  1. Report the issue to the vendor of the program and request a new certificate. 
  2. Install the new certificate on your system.
  3. The alert should now no longer be triggered.

There you go, we hope that these three quick workarounds helped you to fix the problem.

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