Combofix

ComboFix is a program, created by sUBs, that scans your computer for known malware, and when found, attempts to clean these infections automatically. In addition to being able to remove a large amount of the most common and current malware, ComboFix also displays a report that can be used by trained helpers to remove malware that is not automatically removed by the program.

link(source): http://www.bleepingcomputer.com/combofix/how-to-use-combofix

Free Software Security List

Freeware Antivirus
Antivir Personal Edition Classic
avast! 4 Home Edition
AVG Free
BitDefender Free Edition
McAfee VirusScan Plus – Special edition from AOL

Online Antivirus Scanner
BitDefender Online Scanner
Computer Associates eTrust Antivirus Web Scanner
ESET Online Scanner
F-Secure Online Scanner
Panda ActiveScan
Trend Micro™ HouseCall

LiveCD Antivirus
Avira AntiVir Rescue System
F-Secure Rescue CD 3.00
Dr. Web LiveCD

Anti-Malware
a-squared Free
Ad-Aware Free
Comodo BOClean

Malwarebytes' Anti-Malware
Spybot - Search and Destroy
SpywareBlaster
SUPERAntiSpyware
Windows Defender

Host Intrusion Protection System
AntiHook
CORE FORCE
Dynamic Security Agent
Online Armor Free
ProcessGuard
System Safety Monitor Free Edition
ThreatFire
Winpooch

Firewall
Comodo Firewall Pro
Jetico Personal Firewall 1.0
Kerio Personal Firewall 2.1.5

Outpost Free Firewall
Sunbelt Personal Firewall
Sygate Personal Firewall
Webroot Desktop Firewall
ZoneAlarm Free

Anti-Rootkit
Avira AntiRootkit Tool
F-Secure BlackLight
McAfee Rootkit Detective
Panda Anti-Rootkit
Sophos Anti-Rootkit
Trend Micro Rootkit Buster

Anti-Phishing
Gralicwrap
PhishGuard
SpoofStick

P2P Security
PeerGuardian 2


HOST file
hphosts
MVPS Host FIle

Specialized Malware Removal Tool
Malware Removal
McAfee Stinger
Noob.Killer
Norman Malware Cleaner
Windows Malicious Software Removal Tool


Web Security and Content Filtering
K9 Web Protection
McAfee® SiteAdvisor

Other files
Autorun Eater
FreeFixer
HijackThis
IE-Spyad
LSP Fix
Remove Restriction Tool
Security and Privacy Complete