- AVG Free – antivirus
- Avast Home Free – antivirus
- AntiVir PersonalEdition – antivirus
- BitDefender Free – antivirus
- ClamWin – antivirus
- CyberDifender – Internet Security Suite
- Ad-aware – anti-spyware
- Spybot: Search & Destroy – anti-spyware
- Windows Defender – anti-spyware
- SpywareBlaster – anti-spyware
- Spyware Terminator – anti-spyware
- Tootkit Reveaker – rootkit detection utility
- Winpooch – system protection
- HiJack Free – system protection
- HighJackThis – hijackers detector and remover
- Kerio Personal Firewall – firewall
- Sygate Personal Firewall – firewall
- ZoneAlarm – firewall
- AxCrypt – file encryption
- Simple File Shredder – securely delete files
- PuTTy – SSH client
- KeePass – password manager
- LockNote – password manager
- nPassword – password manager
- Microsoft Baseline Security Analyzer – identify security misconfigurations
