An infiltration is detected

Infiltrations can reach the system from various entry points such as webpages, shared folders, via email or from removable devices (USB, external disks, CDs, DVDs, diskettes, etc.).

Standard behavior

As a general example of how infiltrations are handled by ESET NOD32 Antivirus, infiltrations can be detected using:

Real-time file system protection

Web access protection

Email client protection

On-demand computer scan

Each uses the standard cleaning level and will attempt to clean the file and move it to Quarantine or terminate the connection. A notification window is displayed in the notification area at the bottom right corner of the screen. For more information about cleaning levels and behavior, see Cleaning.

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Cleaning and deleting

If there is no predefined action to take for Real-time file system protection, you will be prompted to select an option in the alert window. Usually the options Clean, Delete and No action are available. Selecting No action is not recommended, as this will leave infected files uncleaned. The exception to this is when you are sure that a file is harmless and has been detected by mistake.

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Apply cleaning if a file has been attacked by a virus that has attached malicious code to the file. If this is the case, first attempt to clean the infected file in order to restore it to its original state. If the file consists exclusively of malicious code, it will be deleted.

If an infected file is “locked“ or in use by a system process, it will usually only be deleted after it is released (normally after a system restart).

Multiple threats

If any infected files were not cleaned during Computer scan (or the Cleaning level was set to No Cleaning), an alert window prompting you to select actions for those files is displayed. Select actions for the files (actions are set individually for each file in the list) and then click Finish.

Deleting files in archives

In Default cleaning mode, the entire archive will be deleted only if it contains infected files and no clean files. In other words, archives are not deleted if they also contain harmless clean files. Use caution when performing a Strict cleaning scan, with Strict cleaning enabled an archive will be deleted if it contains at least one infected file regardless of the status of other files in the archive.

 
If your computer is showing signs of a malware infection, e.g., it is slower, often freezes, etc., we recommend that you do the following:

Open ESET NOD32 Antivirus and click Computer scan

Click Scan your computer (for more information, see Computer scan)

After the scan has finished, review the log for the number of scanned, infected and cleaned files

If you only want to scan a certain part of your disk, click Custom scan and select targets to be scanned for viruses.