Secunia PSI http://secunia.com/vulnerability_scanning/personal/ The Secunia PSI is the vulnerability scanner for your personal computer. It is the FREE security tool designed with the sole purpose of helping you secure your computer from software vulnerabilities.
McAfee SiteAdvisor http://www.siteadvisor.com/ SiteAdvisor will warn you before you interact with a dangerous Web site. McAfee offers free and Plus version of SiteAdvisor. Browser supported: IE, Firefox
Web Of Trust http://www.mywot.com/ WOT is a Free Internet Security addon for Firefox and IE that warns you about online scams and risky websites that try to deliver malware or send spam. WOT warns you before you interact with a risky website.
Free and Plus (paid) versions available. Detects and prevents changes to important Windows settings; notifies if unwanted programs are set to automatically run, if a toolbar has been added to Internet Explorer, if home page, search provider or other internal configurations change. When a new Service or ActiveX component is detected it may be part of a legitimate program. WinPatrol will make sure and if it isn’t, you can tell WinPatrol to disable it. Just adding a program won’t cause a notification but when a program is configured to run without your knowledge, WinPatrol will let you confirm the change is expected. Runs on Windows XP, Vista, Windows 7, Windows 8.x, Windows 10, & supports Windows 64 bit features without conflicts with other programs.
ClamWin Free Antivirus Please note that ClamWin Free Antivirus does not include an on-access real-time scanner. You need to manually scan a file in order to detect a virus or spyware.ClamWin Free Antivirus is based on ClamAV engine and uses GNU General Public License by the Free Software Foundation, and is free (as in freedom) software. http://www.clamwin.com/
Sophos Free Antivirus Removes viruses, spyware, rootkits and fake antivirus Supports Windows XP, Vista and 7 Works alongside your existing antivirus, but it is to be used as an on-demand scanner only. SOPHOS Free AV does not update once installed. A new copy must be downloaded for later scans. http://www.sophos.com/en-us/products/free-tools/virus-removal-tool.aspx
SpywareBlaster http://www.brightfort.com/spywareblaster.html This will block bad ActiveX and harmful cookies from getting on to your PC in the first place. Just download and install the program. Open SpywareBlaster, check for and download updates, then protect against all items checked. Program needs to be kept updated.