How can you protect your home computer? (Cyber Awareness Challenge)

The answer

In the DoD Cyber Awareness Challenge, the correct way to protect your home computer is to install operating-system and application security patches and keep your software up to date. On the challenge's answer choices, the right selection is the one about regularly updating/patching your system. Updates close the security holes that attackers actively exploit, so patching is consistently the most emphasized single defense.

Around that core action, the challenge and DoD guidance stack several layered protections that all work together.

The full home-computer checklist

Good home security is layered, not a single switch. The recommended protections are:

1. Keep software patched and updated — enable automatic updates for your OS, browser, and apps so known vulnerabilities are fixed fast.
2. Run antivirus and anti-spyware — and keep the definitions current so it recognizes new threats.
3. Enable a firewall — it blocks unsolicited inbound connections from the internet.
4. Use strong, unique passwords plus multi-factor authentication (MFA) — so a stolen password alone cannot unlock your accounts.
5. Back up important files regularly — so ransomware or hardware failure cannot wipe out your data.
6. Secure your home Wi-Fi — use WPA2/WPA3 encryption, change the default router password, and don't broadcast an open network.

Each layer covers a different attack path, so a gap in one is caught by another.

Why each control matters (and why weak answers fail)

Distractor answers on this quiz usually promote a single action as sufficient, or an unsafe habit. They are wrong because security is about layers:

• "Just install antivirus" — antivirus alone misses unpatched vulnerabilities and phishing; it is necessary but not sufficient.
• "Turn off updates so nothing breaks" — the opposite of correct; unpatched software is the number-one way home machines get compromised.
• "Use one strong password everywhere" — password reuse means one breach unlocks everything; MFA and unique passwords are the fix.
• "Disable the firewall for faster internet" — this exposes services directly to the internet with no upside worth the risk.

Patching leads the list because most successful attacks exploit known flaws that a patch had already fixed. The attacker is not being clever; the user simply never updated.

The bigger picture

Think of your home computer like a house: patches fix broken locks, antivirus is the alarm, the firewall is the fence, MFA is a second deadbolt, and backups are your insurance. No single one is enough, but together they make you a hard target. Attackers pursue easy victims, so a patched, backed-up, MFA-protected machine usually sends them looking elsewhere.