Free Utilities
Anti-Virus:
Avast: http://www.avast.com/eng/download-avast-…
AVG: http://free.grisoft.com/ww.download?prd=…
Firewalls:
Zone Alarm: http://www.zonealarm.com/store/content/c…
Comodo: http://www.personalfirewall.comodo.com/
Disk Defrag programs:
Defraggler: http://www.defraggler.com/