1. Install and regularly update antivirus software.
2. Ensure that all your system patches and security updates are up to date.
3. Use a good, trusted firewall.
4. Avoid visiting websites hosting malicious content.
5. Regularly scan your PC for any malicious software.
6. Limit user permissions on your PC.
7. Be careful when downloading and opening attachments.
8. Disable Java and ActiveX controls in your web browser.
9. Consider investing in anti-malware software.
10. Disable auto-play function on CDs, DVDs, USB sticks and other devices.