Configuring Files and Programs Scanned by Antivirus

This Article Applies to:

  • Avast Business Antivirus
  • Small Office Protection

You can configure the types of files and programs that are scanned by Avast Business Antivirus or Small Office Protection in the Virus Scans settings. Therefore, the main details for what will be scanned are configured in the scan settings, while exclusions are configured in the General section.

Types of Scans

  • Full Virus Scan—Run an in-depth scan of your system, checking all hard drives, rootkits, and auto-start programs
  • Targeted Scan—Scans only the folders you select when you initiate the scan
  • Explorer Scan—Performs a scan of folders or drives that you specify, but is only available in the Windows context menu when you right-click on a file, folder, or drive
  • Boot-time Scan (MS Windows only)—Runs a scan when the device boots up

You can access the settings for the various scan types by clicking Menu ▸ Settings, then navigating to Protection ▸ Virus Scans.

Customizing Full Virus Scans

Sensitivity

You can determine the sensitivity of the scan by adjusting the scan sensitivity settings. The higher the sensitivity, the higher the protection and potential for false positive malware detections. Reducing the sensitivity reduces the chance of false positive detections, but may also reduce the effectiveness of the scans. Scan sensitivity can be adjusted to Medium, High, or Low sensitivity by dragging the slider.

Scan for potentially unwanted programs (PUPs): enables Avast to scan for programs that are stealthily downloaded with other programs and can perform unwanted activity

Follow links during scan: enables Avast to scan other files used by the files being scanned for potentially harmful content

Test whole files (very slow for big files): enables Avast to scan entire files rather than only the parts typically affected by malicious code

Scan priority: determines how many resources can be utilized by Avast during the scan. Higher priority means a faster scan, but may slow down other processes on the device

Scan Areas

Select or tick the boxes beside the listed areas to include them in your scan. The main area options are:

  • All harddisks: enables Avast to scan all hard drives on your PC
  • System drive: the options in this section apply to data that is stored on physical devices such as hard drives and USB sticks

The following options for scanning will be applied to the area specified above.

All removable media: enables Avast to scan applications that launch automatically when you insert a USB or other removable device into your PC

Rootkits: enables Avast to scan for hidden threats in the system

UEFI  BIOS : enables Avast to scan the main firmware interfaces during boot-up

CD-ROM & DVD drives: enables Avast to scan CD and DVD drives for malicious content

Modules loaded in memory: enables Avast to scan applications and processes that launch after system startup or run in the background

Packers and Archives

In the Packers and Archives section you can specify the compressed file types that you want Avast to unpack during the scan.

  • Scan only common installers: scans the contents of executable files utilized when installing applications
  • Scan all archives: scans all archive file contents, which may slow down the scan considerably
  • Don't scan archives: disables Avast from scanning archive files

File Types

Specify the file types that are prioritized when scanning your PC for malware:

  • Content based types (slow): scans files that are typically most vulnerable to malware attacks
  • Name extension based types (fast): scans files with only risky extensions, such as .exe, .com, .bat
  • Scan all files (very slow): scans all files on your PC for malware

Perform automatic actions during this scan: enable this option and define the automatic action when an infected file is found:

  • Fix automatically: enables Avast to repair the infected file. If repair is not possible, the file is moved to the Virus Chest, and if that fails the file is deleted
  • Move file to Virus Chest : the infected file will not be repaired automatically, but will be moved to the Virus Chest
  • Delete File: Avast will not try to repair the infected file or move it to the Virus Chest, instead the file will be deleted automatically

Shut down computer after scan finishes: enables Avast to shut down your computer after the scan completes

Generate report file: enables Avast to create and store a report file automatically. The report file location is listed beneath this option.

Exceptions

Although it is not recommended to exclude any files or folders from a scan, you can define certain exceptions to temporarily exclude particular files or folders from a scan for troubleshooting purposes. At the bottom of the scan settings page, click View exceptions. From there you can follow the steps in Configuring Standard Antivirus Exclusions.

Customizing Targeted Scans

Sensitivity

You can determine the sensitivity of the scan by adjusting the scan sensitivity settings. The higher the sensitivity, the higher the protection and potential for false positive malware detections. Reducing the sensitivity reduces the chance of false positive detections, but may also reduce the effectiveness of the scans. Scan sensitivity can be adjusted to Medium, High, or Low sensitivity by dragging the slider.

Scan for potentially unwanted programs (PUPs): enables Avast to scan for programs that are stealthily downloaded with other programs and can perform unwanted activity

Follow links during scan: enables Avast to scan other files used by the files being scanned for potentially harmful content

Test whole files (very slow for big files): enables Avast to scan entire files rather than only the parts typically affected by malicious code

Scan priority: determines how many resources can be utilized by Avast during the scan. Higher priority means a faster scan, but may slow down other processes on the device

Packers and Archives

In the Packers and Archives section you can specify the compressed file types that you want Avast to unpack during the scan.

  • Scan only common installers: scans the contents of executable files utilized when installing applications
  • Scan all archives: scans all archive file contents, which may slow down the scan considerably
  • Don't scan archives: disables Avast from scanning archive files

File Types

Specify the file types that are prioritized when scanning your PC for malware:

  • Content based types (slow): scans files that are typically most vulnerable to malware attacks
  • Name extension based types (fast): scans files with only risky extensions, such as .exe, .com, .bat
  • Scan all files (very slow): scans all files on your PC for malware

Perform automatic actions during this scan: enable this option and define the automatic action when an infected file is found:

  • Fix automatically: enables Avast to repair the infected file. If repair is not possible, the file is moved to the Virus Chest, and if that fails the file is deleted
  • Move file to Virus Chest : the infected file will not be repaired automatically, but will be moved to the Virus Chest
  • Delete File: Avast will not try to repair the infected file or move it to the Virus Chest, instead the file will be deleted automatically

Shut down computer after scan finishes: enables Avast to shut down your computer after the scan completes

Generate report file: enables Avast to create and store a report file automatically. The report file location is listed beneath this option.

Customizing Explorer Scans

Sensitivity

You can determine the sensitivity of the scan by adjusting the scan sensitivity settings. The higher the sensitivity, the higher the protection and potential for false positive malware detections. Reducing the sensitivity reduces the chance of false positive detections, but may also reduce the effectiveness of the scans. Scan sensitivity can be adjusted to Medium, High, or Low sensitivity by dragging the slider.

Scan for potentially unwanted programs (PUPs): enables Avast to scan for programs that are stealthily downloaded with other programs and can perform unwanted activity

Follow links during scan: enables Avast to scan other files used by the files being scanned for potentially harmful content

Test whole files (very slow for big files): enables Avast to scan entire files rather than only the parts typically affected by malicious code

Scan priority: determines how many resources can be utilized by Avast during the scan. Higher priority means a faster scan, but may slow down other processes on the device

Packers and Archives

In the Packers and Archives section you can specify the compressed file types that you want Avast to unpack during the scan.

  • Scan only common installers: scans the contents of executable files utilized when installing applications
  • Scan all archives: scans all archive file contents, which may slow down the scan considerably
  • Don't scan archives: disables Avast from scanning archive files

File Types

Specify the file types that are prioritized when scanning your PC for malware:

  • Content based types (slow): scans files that are typically most vulnerable to malware attacks
  • Name extension based types (fast): scans files with only risky extensions, such as .exe, .com, .bat
  • Scan all files (very slow): scans all files on your PC for malware

Perform automatic actions during this scan: enable this option and define the automatic action when an infected file is found:

  • Fix automatically: enables Avast to repair the infected file. If repair is not possible, the file is moved to the Virus Chest, and if that fails the file is deleted
  • Move file to Virus Chest : the infected file will not be repaired automatically, but will be moved to the Virus Chest
  • Delete File: Avast will not try to repair the infected file or move it to the Virus Chest, instead the file will be deleted automatically

Shut down computer after scan finishes: enables Avast to shut down your computer after the scan completes

Generate report file: enables Avast to create and store a report file automatically. The report file location is listed beneath this option.

Customizing Boot-time Scans

Sensitivity

You can determine the sensitivity of the scan by adjusting the scan sensitivity settings. The higher the sensitivity, the higher the protection and potential for false positive malware detections. Reducing the sensitivity reduces the chance of false positive detections, but may also reduce the effectiveness of the scans. Scan sensitivity can be adjusted to Medium, High, or Low sensitivity by dragging the slider.

Scan for potentially unwanted programs (PUPs): enables Avast to scan for programs that are stealthily downloaded with other programs and can perform unwanted activity

Unpack archive files: enables Avast to extract ('unpack') files and folders from archives for scanning

Scan Areas

Select or tick the boxes beside the listed areas to include them in your scan. The main area options are:

  • All harddisks: enables Avast to scan all hard drives on your PC
  • System drive: the options in this section apply to data that is stored on physical devices such as hard drives and USB sticks

The following options for scanning will be applied to the area specified above.

Auto start programs: enables Avast to check all auto-start programs

Perform automatic actions during this scan: enable this option and define the automatic action when an infected file is found:

  • Fix automatically: enables Avast to repair the infected file. If repair is not possible, the file is moved to the Virus Chest, and if that fails the file is deleted
  • Move file to Virus Chest: the infected file will not be repaired automatically, but will be moved to the Virus Chest
  • Delete File: Avast will not try to repair the infected file or move it to the Virus Chest, instead the file will be deleted automatically