For GOOD Malware Scanners, download one or more of these scanners from the following websites:
Malwarebytes' Anti-Malware: http://malwarebytes.org/
Malwarebytes is a site dedicated to fighting malware. Malwarebytes has developed a variety of tools that can identify and remove malicious software from your computer. When your computer becomes infected, Malwarebytes can provide the needed assistance to remove the infection and restore the machine back to optimum performance. Malwarebytes Anti-Malware is a surprisingly effective freeware antimalware tool. It's a relatively speedy malware remover, with the quick scan taking about 8 minutes even with other high-resource programs running.
SUPERAntiSpyware: http://superantispyware.com/
Detect and Remove Spyware, Adware and Remove Malware, Trojans, Dialers, Worms, KeyLoggers, HiJackers, Parasites, Rootkits, Rogue Security Products and many other types of threats. Light on System Resources and won't slow down your computer like many other anti-spyware products. Won't conflict with your existing anti-spyware or anti-virus solution! Repair broken Internet Connections, Desktops, Registry Editing and more with our unique Repair System!
Spybot - Search and Destroy: http://www.safer-networking.org/
Spybot - Search & Destroy detects and removes spyware, a relatively new kind of threat not yet covered by common anti-virus applications. Spyware silently tracks your surfing behaviour to create a marketing profile for you that is transmitted without your knowledge to the compilers and sold to advertising companies. If you see new toolbars in your Internet Explorer that you haven't intentionally installed, if your browser crashes inexplicably, or if your home page has been "hijacked" (or changed without your knowledge), your computer is most probably infected with spyware. 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.
AVG Anti-Virus: http://free.avg.com/
Protection against viruses, spyware, adware and trojans. Protects in real time against poisoned web pages while you're surfing. Real-time safety ratings for all search results in Google, Yahoo and MSN/Live search. Easy access to LinkScanner tools, built-in search capability.
Avira AntiVir Personal: http://www.free-av.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, and is not for business or commercial use. Available for Windows or UNIX. AntiVir protection against viruses, worms and Trojans. AntiDialer protection against expensive dialers. AntiRootkit protection against hidden rootkits. Faster Scanning up to 20% faster. New User Interface. AntiPhishing protection against phishing. AntiSpyware protection against spyware and adware. NetbookSupport for laptops with low resolution. QuickRemoval eliminates viruses at the push of a button.
Avast! Home Edition: http://www.avast.com/
Avast! Home Edition detects and removes all forms of malware, including spyware, rootkits and trojans. Resident shield and self-protection. Free automatic updates. Web and P2P protection. Anti-spyware & anti-rootkit tool. Over 30 language versions.
For Good Firewalls, download one or more of these from the following websites:
Comodo Firewall: http://www.comodo.com/
Makes sure that only known PC-safe applications execute. Stops viruses and malware before they access your computer…so it isn't too late to stop them. Firewall remembers which software is allowed to operate and changes its alerts accordingly. Stay current with the latest protection. Warnings specify the level and type of possible threat from each source. Tell the free firewall to scan upon installation and add all current applications to the safe-list. Easily access an at-a-glance snapshot of current security settings. Quickly navigate through the various parts of Firewall protection without getting lost. Preset security settings for simple point-and-click setup. List of over two million known PC-friendly files and apps. Privdes free firewall protection with the knowledge to let safe files and apps run. Firewall software learns your trusted programs to minimize alerts.
ZoneAlarm Basic Firewall: http://www.zonealarm.com/security/en-us/home. Blocks inbound and outbound traffic threats. Makes you invisible to hackers.