Not Only 30 Programs for the Sinclair ZX81

Try the programs out in your browser by clicking on a name below.
Or download a zip of all the P files to try in an emulator or on a real 1K ZX81.

Your Security Settings Have Blocked An Application Exclusive __exclusive__ Site

I’ll help you with a more specific fix.

To help me tailor specific troubleshooting steps, could you tell me you are using (Windows or macOS) and what type of application is being blocked? AI responses may include mistakes. Learn more Share public link

Security features like or Java Security block these by default to protect your personal data from unidentified publishers. Two ways to get around it: For Java: Add the site to your Java Exception Site List . your security settings have blocked an application exclusive

In this deep-dive article, we’ll cover the root causes, step-by-step solutions, and long-term best practices to resolve this error without compromising your computer’s integrity.

By following this guide, you’ll not only fix the error but also gain a deeper understanding of how macOS security works. Now go ahead—install that application with confidence. I’ll help you with a more specific fix

This error is a protective measure by the Java Runtime Environment (JRE) to prevent malicious code from exploiting vulnerabilities in outdated software. However, when you know the application is safe, it can be a major roadblock. Here is how to resolve the issue and get your application running again. Why is this happening?

Open the Start menu, type , and press Enter . Switch to the Security tab. Learn more Share public link Security features like

Below are the most effective solutions, ranked from simplest to most advanced.

Modern operating systems and application runtimes, like Java, prioritize security over convenience. This error occurs because the application you are attempting to run does not meet the current security criteria. Common causes include:

Note that there is no DRAUGHTS program since I couldn't get it to work.

This website was created by Tom White (source on GitHub).
The emulator is subject to the GPL license, version 2.
The programs are copyright (c) 1981 by Beam Software.