The Avast shields use a network proxy which scans all the network traffic on your system. IPv6 network connections are immediately closed. Most clients do not attempt to connect using IPv4 so threatening destination servers become inaccessible. Select the Scan Schedule tab and make sure that Only on AC power check box is enabled, go back to the Settings page (Step 2), and select the General tab, select the Other Settings option in the left pane and make sure that Power Saving Mode in the right pane is On. Avast Security offers Macs protection against malware along with advanced features including a password manager and a network security scanner, all for a cost of exactly nothing.
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Avast Antivirus includes a range of Virus Scans to protect your PC against malware. While customizable settings are available for some scans, we recommend you only modify settings for temporary troubleshooting purposes. Refer to the instructions in this article to adjust scan settings for the following Virus Scans:
- Full Virus Scan: performs an in-depth scan of your system, checking all hard drives, rootkits, and auto-start programs.
- Targeted Scan: scans files or folders, similar to a Targeted Scan, but is only available from the Windows context menu when you right-click a selected file or folder in File Explorer or on your Desktop.
- Explorer Scan: performans a scan of folders or drives that you specify. This scan is only available in the Windows context menu.
- Boot-Time Scan: performs a scan of your PC for malware that is hard to reach after startup.
Open the Virus Scans settings screen
- Open the Avast Antivirus user interface.
- Go to
☰
Menu ▸ Settings. - Select Protection ▸ Virus Scans.
Refer to the sections below for instructions to configure different aspects of scan behavior:
Scan 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 is set to Medium sensitivity by default, but can be adjusted to High sensitivity or Low sensitivity. Scan sensitivity is customizable for Full Virus Scan, Targeted Scan, and Boot-Time Scan.
- Click and hold the white marker, then slide it to your desired sensitivity setting.
- Tick the box next to the following settings to increase sensitivity:
- Scan for potentially unwanted programs (PUPs): enables Avast to scan for programs that are stealthily downloaded with other programs and typically 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.
- Use the drop-down menu to set your Scan priority (High priority by default).
- Click and hold the white marker, then slide it to your desired sensitivity setting.
- Tick the box next to the following settings to increase sensitivity:
- Scan for potentially unwanted programs (PUPs): enables Avast to scan for programs that are stealthily downloaded with other programs and typically 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.
- Use the drop-down menu to set your Scan priority (Medium priority by default).
- Click and hold the white marker, then slide it to your desired sensitivity setting.
- Ensure the boxes next to the following settings are ticked to increase sensitivity:
- Scan for potentially unwanted programs (PUPs): enables Avast to scan for programs that are stealthily downloaded with other programs and typically 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.
- Use the drop-down menu to set your Scan priority (High priority by default).
- Click and hold the white marker, then slide it to your desired sensitivity setting.
- Tick the box next to the following settings to increase sensitivity:
- Scan for potentially unwanted programs (PUPs): enables Avast to scan for programs that are stealthily downloaded with other programs and typically perform unwanted activity.
- Unpack archive files
Scan areas
In this section you can determine the areas that are scanned on your PC. The Scan areas settings are only available for Full Virus Scan and Boot-Time Scan.
Select or tick the box next to the following scan areas to include them in the scan:
- 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.
- All Removable media: enables Avast to scan applications that launch automatically when you insert a USB or other removable device into your PC. Scans of removable media, such as DVDs, may take a long time due to speed limitations.
- Rootkits: enables Avast to scan for hidden threats in the system.
- 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.
Select or tick the box next to the following scan areas to include them in the scan:
- 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.
- 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.
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. These settings are available for Full Virus Scan, Targeted Scan, and Explorer Scan.
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Select the file types you want included in the scan:
- Scan most common used types: archive commonly used file types such as .zip, .rar, and other executable or installer archives.
- Scan all types of archives: the scan analyzes all archive files, which significantly increases the scan duration.
- Don't scan archives: disables Full Virus Scan from scanning archive files.
Select the file types you want included in the scan:
- Scan most common used types: archive commonly used file types such as .zip, .rar, and other executable or installer archives.
- Scan all types of archives: the scan analyzes all archive files, which significantly increases the scan duration.
- Don't scan archives: disables Targeted Scan from scanning archive files.
Select the file types you want included in the scan:
- Scan most common used types: archive commonly used file types such as .zip, .rar, and other executable or installer archives.
- Scan all types of archives: the scan analyzes all archive files, which significantly increases the scan duration.
- Don't scan archives: disables Explorer Scan from scanning archive files.
File Types
Specify the file types that are prioritized when scanning your PC for malware. These settings are available for Full Virus Scan, Targeted Scan, and Explorer Scan.
Select or tick the box next to the following file types to prioritize them in the scan:
- 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 Full Virus Scan completes.
- General report file: enables Avast to create and store a report file automatically.
Select or tick the box next to the following file types to prioritize them in the scan:
- 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 Targeted Scan completes.
- General report file: enables Avast to create and store a report file automatically.
Select or tick the box next to the following file types to prioritize them in the scan:
- 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 Explorer Scan completes.
- General report file: enables Avast to create and store a report file automatically.
Exceptions
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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 Full Virus Scan or Targeted Scan for troubleshooting purposes.
To exclude a file from scanning:
- Click View exceptions.
- On the Exceptions settings screen, click the Add Exception button.
- Type the specific file path or web address and click Add Exception.
- Optionally, click Browse, tick the box next to a file or folder you want to add to your exceptions, and click OK.
To exclude a file from scanning:
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- Click View exceptions.
- On the Exceptions settings screen, click the Add Exception button.
- Type the specific file path or web address and click Add Exception.
- Optionally, click Browse, tick the box next to a file or folder you want to add to your exceptions, and click OK.
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Avast Security and Avast Premium Security (previously Avast Security Pro) provide a range of scans to protect your Mac from malware and network threats. You can also create your own scans with parameters you specify. The following virus scans are available:
- Mac Scan: quickly scan the most vulnerable areas of your Mac.
- Deep Scan: perform an in-depth scan of your system, including checking your storage drives and memory for malware.
- Targeted Scan: scan specific files or folders on your Mac.
- USB/DVD Scan: scan any removeable storage devices connected to your Mac.
- Custom Scans: create and set your own scan parameters, including scheduling your custom scans to run regularly and automatically.
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Run a scan
All scans can be run from the Scan Central screen. Follow the steps below to run a scan:
Deep Scan may take several minutes or more to complete, depending on the number of files and the performance of your system.
- In your Applications folder, double-click the Avast icon to open the application.
- Click
…
(three dots). - To start your preferred scan:
- Mac Scan: Click Run Mac Scan.
- Deep Scan: Click Scan Now.
- Targeted Scan: Click Scan Now, then select the files or folders you would like to scan, and click Open.
- USB/DVD Scan: Click Scan Now, then select the removeable drives you would like to scan and click Start.
- Custom Scans: Click Open Now, then click the play button (start scan now) on the panel for the scan you want to run.
- Wait while Avast Security scans your Mac for threats.
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When the scan completes, refer to the section below to learn how to process the scan results.
Process scan results
After running a virus scan, details of any detected threats are displayed on the screen. Toms guide, avast free for mac. To process your scan results, we recommend moving detected files to the Virus Chest:
- Select from the following options:
- To move individual files to the Virus Chest, hover the cursor over a listed threat, then click Resolve.
- To move multiple files to the Virus Chest, use the check boxes to select each file, then click Resolve Selected.
- To move all files to the Virus Chest, click the check box at the top of the list, then click Resolve Selected.
- After resolving the detected threats, or if no threats are found, click Done to return to Scan Central. If you choose to ignore the detected threats, click the back arrow, then Ignore, to return to Scan Central.
To learn more about the Virus Chest, refer to the following article:
Create a custom scan
Custom Scans allow you to create and schedule your own scans to run regularly and automatically. To set your own scan parameters:
- Click Open Now on the Custom Scans tile.
- Click New Custom Scan.
- Enter a Scan Name, then use the drop-down menus to select Type of Scan and Frequency. You can select from the following options:
- Type of scan: Targeted Scan, Deep Scan, or Mac Scan.
- Frequency: Once, Daily, Weekly, or Monthly.
- Review the Advanced settings list and check or uncheck the box next to any items you want to include or exclude from your scan.
- If you want to exclude any files or folders from the scan, click Add Exceptions, then select the relevant file or folder and click Open.
- Click Save.
Your custom scan is set up and appears in the Custom Scans list. To edit or delete the scan, hover your cursor over the scan details and click
…
(three dots), then select Edit scan or Remove scan.
Adjust scan settings
To access settings for the pre-defined scans:
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- Click the Settings icon on the Scan Central screen, or go to ☰ Menu ▸ Settings, and select the Scans tab.
- Use the check boxes next to each setting to select or deselect your preferred options for each of the pre-defined scans.
- To exclude a file or folder from a scan, click Add Exceptions, then select the relevant file or folder, and click Open.
- When you have finished adjusting scan settings, click the red
X
in the top-left corner to close the Preferences window.
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