Select the Full Virus Scan tab, and refer to the sections below to adjust the scan settings:

• Scan sensitivity
• Parts of your PC to scan
• Installers and archives
• File types
• Automatic actions

Scan sensitivity

Scan sensitivity is set to Medium sensitivity by default, but can be adjusted to High sensitivity or Low sensitivity. 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.

• Click and slide the green marker to your desired sensitivity setting.

Optionally, tick the box next to the following settings to increase sensitivity:

• Notify me about potentially unwanted programs (enabled by default): Receive notifications about programs that are stealthily downloaded with other programs and typically perform unwanted activity.
• Scan for Tools: Scan for potentially harmful apps.
• Follow file-system links during scan: Scan other files used by the files being scanned for potentially harmful content.
• Test whole files (very slow for big files): Scan entire files rather than only the parts typically affected by malicious code.

Use the drop-down menu to set your Scan priority (High priority by default).

Parts of your PC to scan

Select or tick the box next to the following options to include them in the scan:

• All hard disks (selected by default): Scan all hard drives on your PC.
• System drive: Scan only the operating system drive.
• All removable media (enabled by default): Scan applications that launch automatically when you insert a USB or other removable device into your PC.
• Rootkits (enabled by default): Scan for hidden threats in the system.
• UEFI BIOS: Scan for hidden threats in the UEFI BIOS boot-up process.
• CD-ROM & DVD drives: Scan CD and DVD drives for malicious content.
• Startup programs and modules loaded in memory (enabled by default): Scan applications and processes that launch after system startup or run in the background.

Installers and archives

Select the compressed file types you want unpacked during the scan:

• Scan only common installers (selected by default): Only scan the contents of executable files used to install apps.
• Scan all archives: Scan the contents of all archive files (7-Zip, RAR, ZIP, installers, etc.). This results in slower scans.
• Don't scan archives: Ignore all archive files during scans. This results in faster scans.

File Types

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

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

Automatic actions

Tick the box next to Perform automatic actions during this scan, and select one of the following options to define the automatic action when an infected file is found:

• Fix automatically (selected by default): Avast tries to repair the infected file. If repair is not possible, the file is moved to Quarantine, and if that fails, the file is deleted.
• Move to Quarantine: The infected file is not repaired, and is instead moved to Quarantine.
• Delete: The infected file is not repaired or moved to Quarantine. Instead, the file is automatically deleted.

Optionally, tick the box next to the following settings:

• Optionally, tick the box next to the following settings:
• Shut down computer after scan finishes: Avast shuts down your computer after the Full Virus Scan completes.
• Generate report file: Avast automatically creates and stores a report file about the scan.