I often find myself setting up computers for others. Here's the quick sketch of software I set up:

• Internet access
• Zone Alarm http://www.zonealarm.com/ Download & Buy > Zone Alarm > Download
• Windows Update http://windowsupdate.microsoft.com/
• Spybot Search & Destroy http://www.safer-networking.org/en/home/
• Firefox http://www.mozilla.org/products/firefox/
  • Adblock
  • Googlebar
  • Imagezoom
• E-mail, IM, other things at user's request
  • GIMP http://www.gimp.org