Shell Extension Scan
Shell extension means integrating the AVG scanning feature into your file manager (Windows Explorer, Total Commander, and many others). It allows you to easily and instantly scan any file or folder in your computer without having to open the AVG interface.
How to run Shell Extension Scan
It is very simple indeed: Right-click any item (a file, folder, drive or removable media), and select Scan with AVG in the context menu.
How to modify the scan settings
Shell extension scan is editable just like any other AVG scan. The setting options can be accessed from the AVG Main Screen -> Main Menu Tools -> Advanced settings… -> branch Scans -> Shell extension scan.