Avast Free Antivirus

Avast 6's interface is virtually identical to the previous version's. Perhaps the most major change, aside from a slight lightening of the gray in the color scheme, is the removal of the Windows Explorer-style forward and backward buttons. We actually liked those, since they made it easy to return to a previous pane, no matter how deeply into the settings you had explored.

The only other change is the addition of the Additional Protection tab to the left nav area, which hosts the new AutoSandbox and WebRep feature controls.
For users new to Avast, the sleek user interface is a change that came at the end of 2009. The gray-and-orange color scheme stands out well on the screen, and the tab-based navigation on the left makes it easy to navigate between features. Highlighted with the familiar security colors of green for safe and red for dangerous, the Summary tab gives up-to-date info on shield status, auto-updates, virus definitions, the program version, and whether the silent/gaming mode is on. There's also an unobtrusive ad urging you to upgrade to Avast Internet Security 6.
The Summary tab contains a second submenu, Statistics. If you're curious to see how Avast's shields have been performing against threats, here's where you can get your math geek on. For each shield, it tells you how many files were scanned and when, and presents the data in a concise graph.

Avast 6 keeps its interface from Avast 5, and adds features both big and small. Some that had previously only been available to paid upgrade users are now free for all versions, and newer features have been seamlessly added to the interface experience. If you're familiar with Avast 5, upgrading to Avast 6 won't be that big of a leap.