Recommendations

1. First, do Microsoft’s free “full service scan” here:  http://onecare.live.com/site/en-us/default.htm
2. Be sure to check that your computers are setup to automatically download all the future Microsoft patches:
   http://www.microsoft.com/windows/downloads/windowsupdate/automaticupdate.mspx
3. Choose and install a firewall http://www.microsoft.com/security/firewalls/choosing.aspx
4. If you don’t have any commercial antivirus (McAfee, Symantec, etc),  install Microsoft’s free anti-virus software http://www.microsoft.com/security_essentials
5. Add antispyware http://www.microsoft.com/windows/products/winfamily/defender/default.mspx

Other tools

McAfee Free Services

http://home.mcafee.com/store/FreeServices.aspx

You’ll find a list of reputable sources that offer one-time scans here: http://www.staysafeonline.org/content/free-security-check-ups

Removing Viruses from a PC That Won’t Boot

http://www.krebsonsecurity.com/2010/03/removing-viruses-from-a-pc-that-wont-boot/

AVG Link Scanner

http://linkscanner.explabs.com/linkscanner/avg/?cmpid=roger

12 Free Security Software Tools

http://www.pcmag.com/article2/0,2817,2347961,00.asp

Stay Safe Online

http://www.staysafeonline.org/

Symantec/ Norton

http://www.symantec.com/norton/familyresources

http://www.symantec.com/content/en/us/home_homeoffice/media/pdf/norton_cybercrime_exposed_booklet.pdf

Security Advice Wizard

http://www.techsupportalert.com/secwiz

Spyware Doctor

http://www.pctools.com/spyware-doctor-antivirus/

Secunia Personal Software Inspector (PSI) http://secunia.com/vulnerability_scanning/personal

Free Web Security Tools

WOT is a community-based safe surfing tool that warns you about risky sites that cheat customers, deliver malware or send spam.  For Firefox, IE & Google Chrome.  http://www.mywot.com/

SiteAdvisor adds small site rating icons to your search results as well as a browser button and optional search box. Together, these alert you to potentially risky sites and help you find safer alternatives. http://www.siteadvisor.com/

Finjan SecureBrowsing is a security extension for your browser that scans and classifies web addresses to provide you with safety rating of URLs before you visit them.

http://securebrowsing.finjan.com/