A user's work PC has been the target of multiple phishing attacks.

Phishing attacks are typically delivered via email, so the most effective immediate measure is to filter out these malicious emails.

Enabling Windows Firewall: Helps protect against network threats but does not specifically address phishing emails.

Activating the email spam filter: Directly targets phishing attempts by filtering and blocking suspicious emails before they reach the user.

Using a secure VPN connection: Enhances secure communications but does not prevent phishing attacks.

Running vulnerability scans on a schedule: Identifies and mitigates vulnerabilities but does not address phishing emails directly.