Free utilities for windows computers and where you can find them
NOTE: Please check with each license agreement because most are free for personal but not for corporate use.
Real-time Antivirus
AVG Antivirus - http://free.grisoft.com/freeweb.php/doc/2/
Web-based Antivirus Scans
TrendMicro - http://housecall.trendmicro.com/
PandaActiveScan - http://www.pandasoftware.com/activescan/
bitDefender - http://www.bitdefender.com/scan/licence. php
RAV Antivirus - http://www.ravantivirus.com/scan/
Antivirus Removal Tools
bitDefender - http://www.bitdefender.com/html/free tools.php
S ymantec - http://securitvresponse.svmantec.com/avcenter/tools.list.html
F -secure - http://www.f-secure.com/download -purchase/tools.shtml
Kaspersky - http://www.kaspersky.com/removaltools
Software Firewall
ZoneAlarm - http://www.zonealarm.com
Online Spyware Scan and Removal
ZoneLabs
http://www.zonelabs.com/store/content/promotions/pestscan/pestscan_01165.jsp?lid=home_pestscan
Spyware Removal Tools
Ad-Aware - http://www.1avasoftusa.com/
Spybot Search and Destroy-
http://www.safer-networking.org/en/download/index.htmI
Realtime Monitoring of Spyware
Spybot Search and Destroy
http://www.safernetworking.org/en/download/index.html