A common misconception in cybersecurity is that every single computer system is inherently vulnerable to a breach at any given moment. However, from an ethical hacking and defensive standpoint, a computer is only "hackable" if it presents an exploitable vulnerability. A system that is fully patched, correctly configured, and isolated from unnecessary network exposure is significantly harder to compromise, often to the point where an attack is no longer viable for a standard threat actor.

Vulnerabilities typically arise from three main areas: unpatched software, misconfigurations, and human error. Security patches are updates issued by vendors to fix known vulnerabilities in the operating system or applications. If an administrator applies these patches promptly, they close the "windows of opportunity" that hackers use to gain entry. Furthermore, "exposed ports" refer to network entry points that are left open and listening for connections. A secure system follows the principle of "Least Functionality," meaning only essential ports and services are active, thereby reducing the "attack surface."

The statement that all computers are hackable "without any complications" is incorrect because security is a layered discipline. While a persistent and highly funded state-sponsored actor might eventually find a "Zero-Day" vulnerability (a flaw unknown to the vendor), the vast majority of systems remain secure as long as they adhere to rigorous maintenance schedules. Defensive strategies focus on "Hardening," which involves removing unnecessary software, disabling unused services, and implementing strong authentication. Therefore, a computer that is meticulously updated and shielded by firewalls and intrusion prevention systems does not provide the necessary "foothold" for an attacker to exploit, effectively making it unhackable through known standard vectors. This highlights the importance of proactive management in mitigating attack vectors rather than assuming inevitable defeat.