Keep Your Software Updated
Software updates are one of the most important security measures you can take. Updates patch security vulnerabilities that hackers exploit. Enable automatic updates for Windows or macOS, and keep your browser and other software updated as well.
Tip: Set Windows Update or macOS Software Update to install updates automatically. This is the single most effective thing you can do to protect your computer.
Use Antivirus Software
Windows 10 and 11 include Windows Defender, which provides solid basic protection for most home users. For additional protection, consider a reputable third-party antivirus program. Avoid free antivirus programs from unknown companies — some are actually malware in disguise.
- Windows Defender (built into Windows 10/11) — good basic protection
- Malwarebytes — excellent for detecting and removing malware
- Bitdefender — highly rated paid option
- Norton 360 — comprehensive protection with additional features
Warning: Be cautious of pop-ups claiming your computer is infected and offering to scan it for free. These are often scams. Use only antivirus software you've deliberately installed from a trusted source.
Safe Browsing Habits
Most malware infections come from unsafe browsing habits. Follow these guidelines to stay safe online:
- Only download software from official websites or trusted sources
- Be cautious of email attachments — even from people you know
- Look for 'https://' in the address bar before entering passwords or payment information
- Don't click links in emails claiming to be from your bank, Amazon, or other services — go directly to the website instead
- Be skeptical of anything that seems too good to be true
Back Up Your Data
Even with the best security practices, things can go wrong. Regular backups ensure you don't lose important files to ransomware, hardware failure, or accidental deletion.
- Use Windows Backup or Time Machine (Mac) for automatic local backups
- Consider a cloud backup service like Backblaze ($7/month) for off-site protection
- Back up important files to an external hard drive at least monthly
- Test your backups occasionally to make sure they're working
- Keep at least one backup copy off-site (cloud or external drive stored elsewhere)
Computer Security Checklist
Use this checklist to make sure your computer is protected:
- Windows or macOS is up to date
- Antivirus software is installed and up to date
- Browser is up to date
- Passwords are strong and unique for each account
- Two-factor authentication is enabled on important accounts
- Regular backups are in place
- You know how to recognize phishing emails and tech support scams