AVG Anti-Virus Free Edition Features:

Awards Certifications
Award winning antivirus and antispyware protection to meet your basic security needs.

Surf and search with confidence
AVG LinkScanners real-time web protection

Stay protected on social networks
AVG Social Networking Protection keeps you protected on social networks

Enjoy a faster running PC
AVG Smart Scanning works while youre away from computer and runs in low-priority mode when you use computer

Stay up-to-date
Latest threat information from the AVG Community Protection Network and AVG Protective Cloud Technology available on your computer trough online updates

Core Protection
Keep the toughest online threats out of your computer

Compatibility
Compatible with Windows XP, Windows Vista, and Windows 7 (32bit or 64bit).

This is the 32-bit version.