Here's a list of some budget-friendly security tools you can use for prevention if you need new security tools or if you're looking for an alternative to replace something you're already using (it's not necessary to run two anti-virus products).

Configuration/Vulnerability Management Tools

• Microsoft Baseline Security Analyzer (http://technet.microsoft.com/en-us/security/cc184924.aspx) Great tool to confirm that your computer settings align with security best practices

• SecuniaPSI  (http://secunia.com/vulnerability_scanning/personal/) Powerful software to find security holes in your software before the bad guys do 

• ShieldsUp  (https://www.grc.com/x/ne.dll?bh0bkyd2) A handy website to identify firewall configuration problems that can leave you exposed on the internet

Anti-malware Tools

• Avira  (http://www.free-av.com/) Award winning antivirus program for people without a security budget

• Spybot Search and Destroy  (http://www.safer-networking.org/en/index.html) Award winning program to detect and remove spyware that antivirus often fails to detect

• Spamfighter (http://www.spamfighter.com/)  A highly effective tool to catch spam before it catches you

Password Vault

• KeePass (http://keepass.info/) A simple and extremely secure tool to both organize and protect your passwords