Which of the following measures is essential for securing a PC and protecting it from cyber threats?

Explanation / व्याख्या:

To secure a PC and protect it from cyber threats (like hacking, malware, phishing, ransomware), it is essential to use:

👉 Strong and unique passwords for different accounts and change them regularly.

A strong password:

• Contains uppercase + lowercase letters
• Includes numbers
• Includes special characters (!, @, #, $)
• Is at least 8–12 characters long

Using different passwords ensures that if one account is hacked, others remain safe.

Why other options are incorrect:

1. Only using the computer during daytime hours ❌
   → Cyber threats can happen anytime; time of use does not provide security.
2. Connecting to open Wi-Fi networks ❌
   → Open Wi-Fi is risky and can expose personal data to hackers.
3. Disabling the firewall ❌
   → Firewall protects the system from unauthorized access. Disabling it makes the PC more vulnerable.

Extra Facts / अतिरिक्त जानकारी:

1. A Firewall monitors incoming and outgoing network traffic and blocks suspicious activity.
2. Installing and updating antivirus software is also important.
3. Always enable automatic Windows updates to fix security vulnerabilities.
4. Use Two-Factor Authentication (2FA) for extra protection.
5. Avoid clicking on unknown email links to prevent phishing attacks.