AVG Free Edition 6.0 Build 449.
A free registration is required to run AVG. You will be emailed a registration code and can not install it without it.

AVG, you will get a reliable tool for your computer protection against computer viruses.

Main Features:
- AVG Resident Protection
- AVG Email Scanner
- AVG On-Demand Scanner
- Scheduled Tests
- Free Virus Database Updates
- Automatic Update feature
- Easy-To-Use Interface
- Automatic Healing of infected files
- AVG Virus Vault for safe handling of infected files

With AVG 6.0 Free Edition and you will be able to use it without any limitations for life of the product. However you must agree to the AVG Free Edition license agreement and fill in the simple questionaire form.

AVG Professional Edition 6.0 Build 449 = Shareware
Catch both from their Homepage