Here is a list in one place of the current links for many if not most of the free software and resources you need to deal with virus and malware infections, monitoring your computer's behavior (Vista and Win7 only), and buying the right computer:
Free AntiVirus Software
Microsoft Security Essentials
Free on the fly scanning and disinfection software:
Free Monitoring Gadgets:
Microsoft Live Gallery
Buying a Discounted HP, Dell, or Toshiba Computer:
Disk Cloning Software:
Norton Ghost 15
Acronis True Image Home 2011
Click on the Links above!
For Disk Cloning check out the post "Bring In The Clones"
If you do not know what this is all about, you must not have been to the lecture!