To understand why this block occurs, one must first understand the architecture of Java. Unlike native Windows applications that run directly on the operating system, Java applications run within a "sandbox"—a virtual environment designed to isolate the program from the rest of the system. Historically, this sandbox had vulnerabilities that malicious actors exploited to install malware or steal data. In response, Oracle, the steward of Java, progressively tightened the security requirements. By default, Java now blocks applications that are not signed with a trusted digital certificate or those that request excessive permissions, effectively deeming unsigned code as a high-security risk.