Avast Antivirus provides a range of scans to protect your PC from malware. You can also create your own scan and specify the parameters. Refer to the sections in this article for details about the following Virus Scans:
Run a scan
To run Explorer Scan, right-click a file or folder on your desktop or in File Explorer, then select Scan selected items for viruses in the menu that appears.
Create a custom scan
To create a custom scan:
Parameters for new Custom scans will save automatically and can be reconfigured at any time. To run a new Custom scan, go to Protection ▸ Virus Scans ▸ Custom scans, then click Scan Now next to the scan you want to run.
Process scan results
After a scan completes, Avast displays all found issues. You can resolve the issues directly on the results screen, or configure each Virus Scan to resolve issues automatically upon detection.
Some detections may require a separate paid license to resolve.
Smart Scan
To learn more about resolving found issues after Smart Scan completes, refer to the following article:
Other Virus Scans
You can define how each scan automatically reacts to a found issue.
If you want Avast to do nothing when an infected file is found, untick the box next to Perform automatic actions during this scan (not recommended). To manage unresolved scan detections at any time, go to Protection ▸ Virus Scans ▸ Scan history.
Special cases
For incomplete scans, an error message indicating the reason the scan was unable to complete is visible on the scanning screen. Although there are many different reasons a scan may be unable to complete, some of the most common reasons are:
Files that are stored in archives cannot harm your system unless they are decompressed.
Adjust scan settings
Although customizable settings are available for some Virus Scans, we recommend you only modify settings for Custom scans. To configure scan settings:
For more information about Virus Scan settings, refer to the following article:
Create and use Rescue Disk
If you suspect your PC is infected with malware and all other Virus Scans (including the Boot-Time scan) were unable to resolve the issue, you can use Rescue Disk. Rescue Disk enables you to scan your PC when your system is not running. This method significantly increases your chances of detecting and removing malware because the malware is detected before it is able to counteract.
For more information about Rescue Disk, refer to the following article:
Review scan history
To review scan history:
Click the red X in the top-left corner to return to the main Virus Scans screen.
Which antivirus did you like the most?
Make your choice and you will be able to see what other users think.
Running A Rapid Scan On Your Hard Drive With Avast! Free
Avast Free Antivirus is an efficient and comprehensive antivirus program. It is one of the most popular antivirus programs available, thanks to the reliable and trustworthy brand that Avast have created. The key features that continue to make Avast Free Antivirus so popular are the easy UI, optimized scanning options and continuously updated database of virus definitions.
Simple, improved UI
The latest version includes a much simpler and quicker to use UI than previous versions. Key features can be easily reached in the sidebar and the homepage is now customizable so you can access the tools you use most often directly. The overall appearance is clean and uncluttered, with buttons intuitively labelled and positioned.
Comprehensive Protection
Avast are constantly updating their database of virus definitions, meaning your computer will be protected against the latest spyware, viruses and potentially hazardous websites. Avast’s large and active community quickly alerts the development team of new security threats which are swiftly countered and added to Avast’s significant database. The browser add-on further improves computer security with features like cookie and social tracking blocking.
Speed
Avast Free Antivirus comes with a range of standard scanning options, based on depth and speed. Rapid scan will suffice in most cases - targeting removable media and the files you select, identifying security threats in usually less than a minute. A startup scan will launch automatically on boot up and is a useful, regular security check. The optimized scan engine in the latest version means scanning of text content is significantly faster than previous versions. Scanning of EXE files is around also faster. Improved memory usage means Avast Free Antivirus should cause less strain on your system so you can continue with other tasks faster.
Summary
Avast Free Antivirus is definitely one of the best free total security managers available. It is relatively lightweight and efficient, while still providing comprehensive security protection. The browser add on can slow browsing speed and the scanning might not be as detailed as some premium antivirus options. But the simple, effective UI and strong security capabilities make Avast Free Antivirus a very good choice for those looking for free computer security.
Why not check out some more malware and virus protection software for Windows by Avast?
Avast Internet Security
Avast Premiere Antivirus Avast Ultimate Antivirus Avast Secureline VPN
Run a scan
To run Explorer Scan, right-click a file or folder on your desktop or in File Explorer, then select Scan selected items for viruses in the menu that appears.
Create a custom scan
To create a custom scan:
Parameters for new Custom scans will save automatically and can be reconfigured at any time. To run a new Custom scan, go to Protection ▸ Virus Scans ▸ Custom scans, then click Scan Now next to the scan you want to run.
Process scan results
After a scan completes, Avast displays all found issues. You can resolve the issues directly on the results screen, or configure each Virus Scan to resolve issues automatically upon detection.
Some detections may require a separate paid license to resolve.
Smart Scan
To learn more about resolving found issues after Smart Scan completes, refer to the following article:
Other Virus Scans
You can define how each scan automatically reacts to a found issue.
If you want Avast to do nothing when an infected file is found, untick the box next to Perform automatic actions during this scan (not recommended). To manage unresolved scan detections at any time, go to Protection ▸ Virus Scans ▸ Scan history.
Special cases
For incomplete scans, an error message indicating the reason the scan was unable to complete is visible on the scanning screen. Although there are many different reasons a scan may be unable to complete, some of the most common reasons are:
Files that are stored in archives cannot harm your system unless they are decompressed.
Adjust scan settings
Although customizable settings are available for some Virus Scans, we recommend you only modify settings for Custom scans. To configure scan settings:
For more information about Virus Scan settings, refer to the following article:
Rootkit Scan Windows 10Create and use Rescue Disk
If you suspect your PC is infected with malware and all other Virus Scans (including the Boot-Time scan) were unable to resolve the issue, you can use Rescue Disk. Rescue Disk enables you to scan your PC when your system is not running. This method significantly increases your chances of detecting and removing malware because the malware is detected before it is able to counteract.
For more information about Rescue Disk, refer to the following article: Compress your os drive.
Review scan historyKaspersky Rootkit Scan
To review scan history:
Click the red X in the top-left corner to return to the main Virus Scans screen.
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