You need to install one firewall.The Windows firewall doesn't stop malware on your pc from dialling out.
http://www.comodogroup.com/ - Comodo firewall.
You need to install one anti virus;
http://free.grisoft.com/freeweb.php/doc/... -AVG anti virus or
http://www.avast.com - Avast Antivirus
http://www.bitdefender.co.uk/site/Main/v... - Bitdefender 8 doesn't run in the background and can be used as a second back up anti virus.
You need all these anti spyware programs;
http://www.ewido.net - AVG(Ewido) anti trojan.
http://www.safer-networking.org - Spybot Search and Destroy anti spyware. Use the Teatimer settings to protect Internet Explorer, and the Immuniser to stop malware getting on your pc.
Spywareblaster works with Internet Explorer and Firefox. It won't uninstall spyware that is already on your pc, but it will prevent hijacks and other malicious changes to your browser.
http://www.javacoolsoftware.com
Plus;
http://www.lavasoft.com - Ad-Aware SE Personal anti adware
And these are useful utilities;
http://www.mozilla.com/ - Firefox web browser.
https://addons.mozilla.org/search.php?q=... - Adblock Plus
http://www.ccleaner.com - Cr*pcleaner Registry cleaner and privacy tool
Winpatrol is a handy utility that manages cookies on your pc and stops unwanted changes to your startup folder.
http://www.winpatrol.com
http://www.siteadvisor.com -MacAffee Site Advisor warns about malware on sites you are about to visit.