http://www.iobit.com

AntiCrash can intercept and fix up to 95.8% crashes, errors, freezes and blue screens. When a crash occurs, AntiCrash fixes it automatically: you have nothing to do!

http://www.dachshundsoftware.com

Avast! 4 Home Edition is a full-featured antivirus package designed exclusively for home users and non-commercial use. Both of these conditions should be met! Our company offers the Home Edition free of charge, since, in our
opinion, it is possible to avoid global virus spreading by efficient prevention; however, many users are not able to or do not want to pay for antivirus software. This page will show you the most important features of this program.

http://www.avast.com

• Easy to use, low system resources

• Automatic update functionality

• Real-time protection as files are opened and programs are run

• AVG’s Virus Vault for the safe handling of infected files

AVG Anti-Virus Free is only available for single computer use for home and non commercial use.

http://free.avg.com

Avira AntiVir Personal - FREE Antivirus is a reliable free antivirus solution, that constantly and rapidly scans your computer for malicious programs such as viruses, Trojans, backdoor programs, hoaxes, worms, dialers etc. Monitors every action executed by the user or the operating system and reacts promptly when a malicious program is detected.

Avira AntiVir Personal is a comprehensive, easy to use antivirus program, designed to offer reliable free of charge virus protection to home-users, for personal use only.

http://www.free-av.com

CCleaner is a freeware system optimization and privacy tool. It removes unused files from your system allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history.

But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware!

http://www.ccleaner.com

ClamWin is a Free Antivirus program for Microsoft Windows 98/Me/2000/XP/2003 and Vista.
ClamWin Free Antivirus comes with an easy installer and open source code.

You may download and use it absolutely free of charge. It features: high detection rates for viruses and spyware,scanning Scheduler, automatic downloads of regularly updated Virus Database.
Standalone virus scanner and right-click menu integration to Microsoft Windows Explorer;
Addin to Microsoft Outlook to remove virus-infected attachments automatically.

http://www.clamwin.com

The Award-Winning, Free Firewall Software

• Complete protection from Hackers, Spyware, Trojans and Identity theft
• Host Intrusion Prevention System stops malware from being installed
• Clean PC Mode registers your current applications then will allow only applications that you approve to be installed on your computer
• free download

Check the website:

http://www.personalfirewall.comodo.com

Eraser is an advanced security tool (for Windows), which allows you to completely remove sensitive data from your hard drive by overwriting it several times with carefully selected patterns. Works with Windows 95, 98, ME, NT, 2000, XP, Windows 2003 Server and DOS.
Eraser is Free software and its source code is released under GNU General Public License.

http://www.heidi.ie/eraser

A general homepage hijackers detector and remover. Initially based on the article Hijacked!, but expanded with a lot of other checks against hijacker tricks. It is continually updated to detect and remove new hijacks. It does not target specific programs/URLs, just the methods used by hijackers to force you onto their sites.

http://www.trendsecure.com/portal/en-US/tools/security_tools/hijackthis

Freeware tool Hitman Pro combines the best of both worlds to fight spyware.
Hitman Pro is a freeware tool that combines a number of powerful anti-spyware programs in one integrated solution. In nearly all anti-spyware reviews, the conclusion is that none of the anti-spyware programs removes all spyware. A combination of two programs is recommended.

Most of the included programs are freeware. Some of these programs are limited trial editions of commercial programs, and the user can decide to switch these off after the trial period.

http://www.surfright.nl/nl

Today you need to remember many passwords. You need a password for the Windows network logon, your e-mail account, your homepage's FTP password, online passwords (like website member account), etc. etc. etc. The list is endless.

http://keepass.info

http://www.pcdecrapifier.com

http://www.pctools.com/free-antivirus

http://www.pctools.com/firewall

Sandboxie runs your programs in an isolated space which prevents them from making permanent changes to other programs and data in your computer.

http://www.sandboxie.com

Snort® is an open source network intrusion prevention and detection system utilizing a rule-driven language, which combines the benefits of signature, protocol and anomaly based inspection methods. With millions of downloads to date, Snort is the most widely deployed intrusion detection and prevention technology worldwide and has become the de facto standard for the industry.

http://www.snort.org

http://www.spamfighter.com

Spybot - Search & Destroy detects and removes spyware, a relatively new kind of threat not yet covered by common anti-virus applications.

Even if you don't see the symptoms, your computer may be infected, because more and more spyware is emerging. Spybot-S&D is free, so there's no harm giving it a try to see if something has invaded your computer.

http://www.safer-networking.org

• Effective Spyware Protection, antivirus Protection Included

• Free 100% Real-Time Protection

• Safe Internet Browsing and Search
  

Web Security Guard is one of many useful Crawler Toolbar’s features that displays website reviews and threat level to help prevent users from entering potentially dangerous websites.

http://www.spywareterminator.com

SpywareBlaster is freeware.
SpywareBlaster can help keep your system spyware-free and secure, without interfering with the "good side" of the web.
And unlike other programs, SpywareBlaster does not have to remain running in the background.

http://www.javacoolsoftware.com

http://us.mcafee.com

• Essential firewall protection
• Be invisible to others online
• New interface makes it even easier—smaller size keeps it light

http://www.zonealarm.com