Using AVG Free
AVG Free for Windows 7 runs in the background all the time, inspecting each program for harmful viruses or spyware before it runs. Open AVG Free's window by double-clicking the AVG icon in your system tray.
The "Overview" window, displayed by default, informs you of the state of all the AVG protection services on your computer. If everything is fine, it reads "You Are Protected" at the top of the AVG window.
AVG updates itself automatically, but you can also update it manually. Perform an update by clicking "Update Now" at the left side of the AVG window.
Perform a scan by clicking "Computer Scanner" at the left side of the AVG window. Scan your entire computer by clicking "Scan Whole Computer." Scan suspect files or directories by clicking "Scan Specific Files or Folders," clicking the checkmark next to a directory and clicking "Start Scan."
Now you know how to install, configure, and use AVG Free for Windows 7.
Screenshots: AVG Anti-Virus Free Edition / Chris Hoffman