What is the best spyware removal and web beacon download to a PC?

Someone has sent e-mails on my PC with web beacons attached then follow what happens to the messages. What is the best I can download that will find and delete them. I AVG and 2Wire. I work from home on a VPN that has a firewall. I tried spybot but reviews say it removes only a small amount or is Cookie Spy / tags and I want those sent by the private person.

Here you have something good and free anti-spyware programs: http://askcomputerexpert.ws43.com/download/security.htm

Spyware Removal Reviews

McAfee Internet Security Suite 2008 – 3 User [OLD VERSION] $1.95 Mcafee Internet Security Suite for PC…

Total Tech VSRTTS247 Virus and Spyware Removal Software $99.72 Identify hidden and high risk computer software Remove malicious software and threats Review/update anti- spyware and anti-virus software Identify missing Microsoft Windows updates Advise how to avoid future infections…