Antivirus software are computer programs that attempt to identify, neutralize or eliminate malicious software. The term "antivirus" is used because the earliest examples were designed exclusively to combat computer viruses; however most modern antivirus software is now designed to combat a wide range of threats, including worms, phishing attacks, rootkits, trojan horses and other malware. Antivirus software typically uses two different approaches to accomplish this:
* examining (scanning) files to look for known viruses matching definitions in a virus dictionary, and
* identifying suspicious behavior from any computer program which might indicate infection.

The second approach is called heuristic analysis. Such analysis may include data captures, port monitoring and other methods.
Most commercial antivirus software uses both of these approaches, with an emphasis on the virus dictionary approach.

Firewalls & Internet Security

AxCrypt - Axantum Software - 1.11MB
AxCrypt is a free and easy to use open source strong file encryption for Windows 95/98/ME/NT/2K/XP, integrated with Windows Explorer. Encrypt, compress, decrypt, wipe, view and edit with a few mouse clicks. Cryptographic primitives are AES-128 and SHA-1.

Comodo Firewall - 9.09MB (Freeware)
Comodo has put firewall through all kinds of sophisticated tests to ensure its firewall powerful enough to ward off these attacks with default settings. No other firewall has had to work this hard.

KeePass - 1.27MB (Open Source)
KeePass is a free/open-source password manager or safe which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key-disk. So you only have to remember one single master password or insert the key-disk to unlock the whole database.

Microsoft Baseline Security Analyzer - Microsoft Corp - 1.31MB (Freeware)
Microsoft Baseline Security Analyzer (MBSA) 2.0 is an easy-to-use tool that helps small and medium businesses determine their security state in accordance with Microsoft security recommendations and offers specific remediation guidance.

Outpost Firewall Free - Agnitum Ltd - 2.50MB (Freeware)
Outpost Firewall gives peace of mind from any threats by cookies, banner ads, e-mail viruses, backdoors, spyware, crackers, adware, and virtually every other Internet danger. Unlike other personal firewalls, Outpost starts protecting against all kinds of internal and external attacks as soon as it's installed.

Password Safe - Rony Shapiro - 1.77MB (Open Source)
Password Safe is an Open Source (free) tool that allows you to have a different password for all the different programs and websites that you deal with, without actually having to remember all those usernames and passwords.

Download PeerGuardian 2.0 Beta 6cPeerGuardian - Phoenix Labs - 1.60MB (Open Source)
PeerGuardian 2 is Phoenix Labs' premier IP blocker for Windows. PeerGuardian 2 integrates support for multiple lists, list editing, automatic updates, and blocking all of IPv4 (TCP, UDP, ICMP, etc), making it the safest and easiest way to protect your privacy on P2P.

Norton Internet Security - Pelindungan terbaik dari Norton terhadap gangguan virus & spyware ketika anda browsing dan didukung oleh Yahoo! - Paket lengkap untuk menghalau semua gangguan komputer ketika berinternet.

Download Sunbelt Kerio Personal Firewall 4.5.916Sunbelt Kerio Personal Firewall - 6.27MB (Non-Commercial Freeware)
Kerio Personal Firewall (KPF) helps users control how their computers exchange data with other computers on the Internet or local network. Kerio Personal Firewall is a necessity for all desktop computers connected to broadband Internet, using DSL, cable, ISDN, WiFi or satellite modems.

Download Sygate Personal Firewall 5.6.2808Sygate Personal Firewall - Sygate Technologies - 8.80MB (Freeware)
Free for personal use, Sygate Personal Firewall provides best of breed security in a user friendly interface, protecting your PC from hackers, trojans, etc.

TrueCrypt - TrueCrypt Foundation - 1.49MB (Open Source)
TrueCrypt is a software system for establishing and maintaining an on-the-fly-encrypted drive. On-the-fly encryption means that data are automatically encrypted or decrypted right before they are loaded or saved, without any user intervention.

Download ZoneAlarm Free 7.0.462.0ZoneAlarm - Mirror Link - Zone Labs - 39.79MB (Non-Commercial Freeware)
Firewall + antivirus + antispyware (tersedia versi gratis & versi trial) - ZoneAlarm is an easy-to-use firewall that blocks hackers and other unknown threats. This free version is for non-commercial use only.