When selecting the type of files to scan, consider the following:
There is a low probability of introducing malicious code into files of certain formats and its subsequent activation (for example, TXT format). At the same time, there are file formats that contain executable code (such as .exe, .dll). The executable code may also be contained in files of formats that are not intended for this purpose (for example, the DOC format). The risk of intrusion and activation of malicious code in such files is high.
An intruder may send a virus or another malicious program to your computer in an executable file that has been renamed with the .txt extension. If you select scanning of files by extension, the application skips this file during scanning. If scanning of files by format is selected, the File Threat Protection component analyzes the file header regardless of the extension. If this analysis reveals that the file has the format of an executable file (for example, EXE), the application scans it.
To select the type of files to scan:
In the main application window, click the Settings button.
In the application settings window, select Tasks → Full scan, Critical Areas Scan, Custom scan, or Scan from Context Menu.
In the Security level section, click the Settings button.
A window with the name of the selected scan task opens.
In the window with the name of the selected scan task, select the Scope tab.
In the File types section, specify the type of files that you want to scan when the selected scan task runs:
If you want to scan all files, select All files.
If you want to scan files of formats which are the most vulnerable to infection, select Files scanned by format.
If you want to scan files with extensions that are typically the most vulnerable to infection, select Files scanned by extension.