PestPatrol is well known for having more false-positives than actual malware. Ad-Aware SE, Spybot, Windows Defender, CWShredder, About:Buster (for additional hijackers to CWShredder). SpywareBlaster is good also, but I personally just deal with removal of malware and not removal + software protection against potential future malware. You will do this yourself mostly by learning from mistakes.